Merge branch 'develop' of github.com:fLotte-meets-HWR-DB/apollo-server into develop

.github/workflows/docker.yml

@@ -0,0 +1,37 @@
+
+name: Build Docker Image
+
+on:
+  push:
+    branches: [ main, dev ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Copy Repo Files
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Portus
+        uses: docker/login-action@v1
+        with:
+          registry: https://flotte-docker-registry.spdns.org/
+          username: ${{ secrets.PORTUS_USERNAME }}
+          password: ${{ secrets.PORTUS_PASSWORD }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64
+          push: true
+          tags: flotte-docker-registry.spdns.org/apollo-server:latest

README.md

@@ -4,14 +4,16 @@ Apollo server written in typescript that handles business logic.
 [![Build Status](https://travis-ci.com/fLotte-meets-HWR-DB/apollo-server.svg?token=YfRmpHAXqyUafCgSEexw&branch=main)](https://travis-ci.com/fLotte-meets-HWR-DB/apollo-server)
 
 ## Assumptions
-Userserver and postgres are running e.g. with Julius' Docker Compose.
+The [flotte-user-management server](https://github.com/fLotte-meets-HWR-DB/flotte-user-management) and postgres are running. Set the [environment variables](#Environment-Variables) accordingly.
 ## Usage
 ### Docker
+You can build and run a docker image with
 ```bash
 docker build -t <image name> .
-docker run --rm -p 4000:4000 <image name>
+docker run --rm -p 4000:4000 <image name> -e ...
 ```
-### Compile and run
+Don't forget to pass all the [environment variables](#Environment-Variables) with the -e option.
+### Compile and Run
 Install gulp if not installed
 ```bash
 npm -g gulp
@@ -21,25 +23,28 @@ npm install
 gulp
 npm start
 ```
+You can set the [environment variables](#Environment-Variables) in a _.env_ file.
 ### For Development
 Install node\_modules and gulp
 ```bash
 npm -g gulp
 npm install
 ```
-And start gulp in watch mode
+Start gulp in watch mode to recompile the type script
 ```bash
-gulp watch
+gulp watchTs
 ```
-This will watch *.ts files in _./src_ and recompile to _./dist_ and finally restart the server.
+This will watch *.ts files in _./src_ and recompile to _./dist_. You will have to restart the server yourself.
 
 ## Environment Variables
 The following environment variables can be used to configure the server:
 ```bash
 RPC_HOST=host:port
-NODE_ENV=development/porduction
+NODE_ENV=develop/production
 POSTGRES_CONNECTION_URL=postgres://username:password@host:port/database_name
 ```
-- __RPC_HOST__ is used for the connection with the userserver.
+- __RPC_HOST__ is used for the connection with the [flotte-user-management server](https://github.com/fLotte-meets-HWR-DB/flotte-user-management).
 - __NODE_ENV__ will not check authentication if set to development
 - __POSTGRES_CONNECTION_URL__ for connection with the postgres database
+
+If the API server cannot connect to the [flotte-user-management server](https://github.com/fLotte-meets-HWR-DB/flotte-user-management) or the postgres data base. It will try to reconnect in an endless loop.

src/datasources/db/cargobikeAPI.ts

@@ -26,7 +26,7 @@ import { Equipment } from '../../model/Equipment';
 import { Engagement } from '../../model/Engagement';
 import { Provider } from '../../model/Provider';
 import { TimeFrame } from '../../model/TimeFrame';
-import { ActionLogger, deleteEntity, LockUtils } from './utils';
+import { ActionLogger, DBUtils, genBoxDimensions, LockUtils } from './utils';
 import { EquipmentType } from '../../model/EquipmentType';
 import { BikeEventType } from '../../model/BikeEventType';
 import { UserInputError } from 'apollo-server-express';
@@ -42,14 +42,8 @@ export class CargoBikeAPI extends DataSource {
         this.connection = getConnection();
     }
 
-    async getCargoBikes (offset: number, limit: number) {
-        return await this.connection.createQueryBuilder()
-            .select('cargoBike')
-            .from(CargoBike, 'cargoBike')
-            .orderBy('name', 'ASC')
-            .offset(offset)
-            .limit(limit)
-            .getMany();
+    async getCargoBikes (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, CargoBike, 'cb', offset, limit);
     }
 
     /**
@@ -104,12 +98,13 @@ export class CargoBikeAPI extends DataSource {
     async updateCargoBike (cargoBike: any, userId:number) {
         const keepLock = cargoBike?.keepLock;
         delete cargoBike.keepLock;
-        delete cargoBike.lendingStationId;
-        let equipmentTypeIds: any = null;
-        if (cargoBike.equipmentTypeIds) {
-            equipmentTypeIds = cargoBike.equipmentTypeIds;
-            delete cargoBike.equipmentTypeIds;
-        }
+        const equipmentTypeIds = cargoBike?.equipmentTypeIds;
+        delete cargoBike?.equipmentTypeIds;
+        const equipmentIds = cargoBike?.equipmentIds;
+        delete cargoBike?.equipmentIds;
+        // generate ranges for box dimensions
+        genBoxDimensions(cargoBike);
+
         await this.connection.transaction(async (entityManager: EntityManager) => {
             if (await LockUtils.isLocked(entityManager, CargoBike, 'cb', cargoBike.id, userId)) {
                 throw new GraphQLError('CargoBike locked by other user');
@@ -125,7 +120,12 @@ export class CargoBikeAPI extends DataSource {
                 .createQueryBuilder('cb')
                 .relation(CargoBike, 'equipmentTypeIds')
                 .of(cargoBike.id)
-                .addAndRemove(equipmentTypeIds, await this.equipmentTypeByCargoBikeId(cargoBike.id)); // TODO remove all existing relations
+                .addAndRemove(equipmentTypeIds, await this.equipmentTypeByCargoBikeId(cargoBike.id));
+            equipmentIds && await entityManager.getRepository(CargoBike)
+                .createQueryBuilder('cb')
+                .relation(CargoBike, 'equipmentIds')
+                .of(cargoBike.id)
+                .addAndRemove(equipmentIds, await this.equipmentByCargoBikeId(cargoBike.id));
         });
         !keepLock && await LockUtils.unlockEntity(this.connection, CargoBike, 'cb', cargoBike.id, userId);
         return await this.findCargoBikeById(cargoBike.id);
@@ -150,8 +150,9 @@ export class CargoBikeAPI extends DataSource {
      * created CargoBike and returns created bike with new ID
      * @param param0 cargoBike to be created
      */
-    async createCargoBike ({ cargoBike }: { cargoBike: any }) {
+    async createCargoBike (cargoBike: any) {
         let inserts: any = {};
+        genBoxDimensions(cargoBike);
         await this.connection.transaction(async (entityManager:any) => {
             inserts = await entityManager.getRepository(CargoBike)
                 .createQueryBuilder('cb')
@@ -164,6 +165,11 @@ export class CargoBikeAPI extends DataSource {
                 .relation(CargoBike, 'equipmentTypeIds')
                 .of(inserts.identifiers[0].id)
                 .add(cargoBike.equipmentTypeIds);
+            cargoBike?.equipmentIds && await entityManager.getRepository(CargoBike)
+                .createQueryBuilder('cb')
+                .relation(CargoBike, 'equipmentIds')
+                .of(inserts.identifiers[0].id)
+                .add(cargoBike.equipmentIds);
         });
         inserts.generatedMaps[0].id = inserts?.identifiers[0].id;
         return inserts?.generatedMaps[0];
@@ -198,11 +204,11 @@ export class CargoBikeAPI extends DataSource {
     }
 
     async deleteBikeEventType (id: number, userId: number) {
-        return await deleteEntity(this.connection, BikeEventType, 'bet', id, userId);
+        return await DBUtils.deleteEntity(this.connection, BikeEventType, 'bet', id, userId);
     }
 
     async deleteBikeEvent (id: number, userId: number) {
-        return await deleteEntity(this.connection, BikeEvent, 'be', id, userId);
+        return await DBUtils.deleteEntity(this.connection, BikeEvent, 'be', id, userId);
     }
 
     async cargoBikeByEventId (id: number) {
@@ -221,7 +227,14 @@ export class CargoBikeAPI extends DataSource {
             .loadOne();
     }
 
-    async bikeEventsByCargoBikeId (id: number, offset: number = 0, limit:number = 100) {
+    async bikeEventsByCargoBikeId (id: number, offset?: number, limit?: number) {
+        if (offset === null || limit === null) {
+            return await this.connection.getRepository(CargoBike)
+                .createQueryBuilder('cb')
+                .relation(CargoBike, 'bikeEvents')
+                .of(id)
+                .loadMany();
+        } else {
             return await this.connection.getRepository(CargoBike)
                 .createQueryBuilder('cb')
                 .skip(offset)
@@ -230,6 +243,7 @@ export class CargoBikeAPI extends DataSource {
                 .of(id)
                 .loadMany();
         }
+    }
 
     async createBikeEventType (bikeEventType: any) {
         return (await this.connection.getRepository(BikeEventType)
@@ -267,22 +281,12 @@ export class CargoBikeAPI extends DataSource {
         return await this.bikeEventTypeById(bikeEventType.id);
     }
 
-    async bikeEventTypes (offset: number, limit: number) {
-        return await this.connection.getRepository(BikeEventType)
-            .createQueryBuilder('bet')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async bikeEventTypes (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, BikeEventType, 'bet', offset, limit);
     }
 
-    async bikeEvents (offset: number, limit: number) {
-        return await this.connection.getRepository(BikeEvent)
-            .createQueryBuilder('be')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async bikeEvents (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, BikeEvent, 'be', offset, limit);
     }
 
     async bikeEventTypeById (id: number) {
@@ -343,12 +347,22 @@ export class CargoBikeAPI extends DataSource {
      * @param limit
      * @param id
      */
-    async equipmentByCargoBikeId (offset: number, limit: number, id: number) {
+    async equipmentByCargoBikeId (id: number, offset?: number, limit?: number) {
+        if (offset == null || limit === null) {
             return await this.connection.getRepository(Equipment)
                 .createQueryBuilder('equipment')
                 .select()
                 .where('equipment."cargoBikeId" = :id', { id: id })
                 .getMany();
+        } else {
+            return await this.connection.getRepository(Equipment)
+                .createQueryBuilder('equipment')
+                .select()
+                .where('equipment."cargoBikeId" = :id', { id: id })
+                .skip(offset)
+                .take(limit)
+                .getMany();
+        }
     }
 
     async createEquipment ({ equipment }: { equipment: any }) {
@@ -406,17 +420,11 @@ export class CargoBikeAPI extends DataSource {
     }
 
     async deleteEquipment (id: number, userId: number) {
-        return await deleteEntity(this.connection, Equipment, 'e', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Equipment, 'e', id, userId);
     }
 
-    async getEquipment (offset: number, limit: number) {
-        return await this.connection.getRepository(Equipment)
-            .createQueryBuilder('equipment')
-            .leftJoinAndSelect('equipment.cargoBike', 'cargoBike')
-            .orderBy('title', 'ASC')
-            .offset(offset)
-            .limit(limit)
-            .getMany();
+    async getEquipment (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Equipment, 'e', offset, limit);
     }
 
     async createEquipmentType (equipmentType: any) {
@@ -460,7 +468,7 @@ export class CargoBikeAPI extends DataSource {
     }
 
     async deleteEquipmentType (id:number, userId: number) {
-        return await deleteEntity(this.connection, EquipmentType, 'et', id, userId);
+        return await DBUtils.deleteEntity(this.connection, EquipmentType, 'et', id, userId);
     }
 
     async equipmentTypeById (id: number) {
@@ -471,13 +479,8 @@ export class CargoBikeAPI extends DataSource {
             .getOne();
     }
 
-    async equipmentTypes (offset: number, limit: number) {
-        return await this.connection.getRepository(EquipmentType)
-            .createQueryBuilder('et')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async equipmentTypes (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, EquipmentType, 'et', offset, limit);
     }
 
     async equipmentTypeByCargoBikeId (id: number) {

src/datasources/db/contactinformationAPI.ts

@@ -21,7 +21,7 @@ import { DataSource } from 'apollo-datasource';
 import { Connection, EntityManager, getConnection } from 'typeorm';
 import { ContactInformation } from '../../model/ContactInformation';
 import { Person } from '../../model/Person';
-import { ActionLogger, deleteEntity, LockUtils } from './utils';
+import { ActionLogger, DBUtils, LockUtils } from './utils';
 import { GraphQLError } from 'graphql';
 import { LendingStation } from '../../model/LendingStation';
 
@@ -32,13 +32,8 @@ export class ContactInformationAPI extends DataSource {
         this.connection = getConnection();
     }
 
-    async contactInformation (offset: number, limit: number) {
-        return await this.connection.getRepository(ContactInformation)
-            .createQueryBuilder('ci')
-            .select()
-            .offset(offset)
-            .limit(limit)
-            .getMany();
+    async contactInformation (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, ContactInformation, 'ci', offset, limit);
     }
 
     async contactInformationById (id: number) {
@@ -88,16 +83,11 @@ export class ContactInformationAPI extends DataSource {
     }
 
     async deletePerson (id: number, userId: number) {
-        return await deleteEntity(this.connection, Person, 'p', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Person, 'p', id, userId);
     }
 
-    async persons (offset: number, limit: number) {
-        return await this.connection.getRepository(Person)
-            .createQueryBuilder('person')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async persons (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Person, 'p', offset, limit);
     }
 
     async personById (id: number) {
@@ -171,7 +161,7 @@ export class ContactInformationAPI extends DataSource {
     }
 
     async deleteContactInformation (id: number, userId: number) {
-        return await deleteEntity(this.connection, ContactInformation, 'ci', id, userId);
+        return await DBUtils.deleteEntity(this.connection, ContactInformation, 'ci', id, userId);
     }
 
     async contactInformationByPersonId (id: number) {

src/datasources/db/lendingstationAPI.ts

@@ -19,12 +19,11 @@ This file is part of fLotte-API-Server.
 
 import { DataSource } from 'apollo-datasource';
 import { UserInputError } from 'apollo-server-express';
-import { GraphQLError } from 'graphql';
 import { Connection, EntityManager, getConnection } from 'typeorm';
 import { CargoBike } from '../../model/CargoBike';
 import { LendingStation } from '../../model/LendingStation';
 import { TimeFrame } from '../../model/TimeFrame';
-import { ActionLogger, deleteEntity, genDateRange, LockUtils } from './utils';
+import { ActionLogger, genDateRange, DBUtils, LockUtils } from './utils';
 
 export class LendingStationAPI extends DataSource {
     connection : Connection
@@ -44,14 +43,8 @@ export class LendingStationAPI extends DataSource {
     /**
      * get all lendingStations
      */
-    async lendingStations (offset: number, limit: number) {
-        return await this.connection.getRepository(LendingStation)
-            .createQueryBuilder('lendingStation')
-            .select()
-            .offset(offset)
-            .limit(limit)
-            .orderBy('name', 'ASC')
-            .getMany() || new GraphQLError('Internal Server Error: could not query data from table lendingStation');
+    async lendingStations (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, LendingStation, 'ls', offset, limit);
     }
 
     /**
@@ -79,13 +72,8 @@ export class LendingStationAPI extends DataSource {
             .loadOne();
     }
 
-    async timeFrames (offset: number, limit: number) {
-        return await this.connection.getRepository(TimeFrame)
-            .createQueryBuilder('timeframe')
-            .select()
-            .offset(offset)
-            .limit(limit)
-            .getMany() || [];
+    async timeFrames (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, TimeFrame, 'tf', offset, limit);
     }
 
     async timeFramesByCargoBikeId (id: number) {
@@ -190,15 +178,12 @@ export class LendingStationAPI extends DataSource {
     }
 
     async deleteLendingStationById (id: number, userId: number) {
-        return await deleteEntity(this.connection, LendingStation, 'ls', id, userId);
+        return await DBUtils.deleteEntity(this.connection, LendingStation, 'ls', id, userId);
     }
 
     async createTimeFrame (timeFrame: any) {
         return await this.connection.transaction(async (entityManager: EntityManager) => {
-            if (timeFrame.to === undefined) {
-                timeFrame.to = '';
-            }
-            timeFrame.dateRange = '[' + timeFrame.from + ',' + timeFrame.to + ')';
+            genDateRange(timeFrame);
             // checking for overlapping time frames
             const overlapping = await entityManager.getRepository(TimeFrame)
                 .createQueryBuilder('timeframe')
@@ -268,6 +253,6 @@ export class LendingStationAPI extends DataSource {
     }
 
     async deleteTimeFrame (id: number, userId: number) {
-        return await deleteEntity(this.connection, TimeFrame, 'tf', id, userId);
+        return await DBUtils.deleteEntity(this.connection, TimeFrame, 'tf', id, userId);
     }
 }

src/datasources/db/participantAPI.ts

@@ -23,7 +23,7 @@ import { ContactInformation } from '../../model/ContactInformation';
 import { Engagement } from '../../model/Engagement';
 import { Participant } from '../../model/Participant';
 import { EngagementType } from '../../model/EngagementType';
-import { ActionLogger, deleteEntity, genDateRange, LockUtils } from './utils';
+import { ActionLogger, DBUtils, genDateRange, LockUtils } from './utils';
 import { UserInputError } from 'apollo-server-express';
 import { GraphQLError } from 'graphql';
 
@@ -42,13 +42,8 @@ export class ParticipantAPI extends DataSource {
             .getOne();
     }
 
-    async getParticipants (offset: number, limit: number) {
-        return await this.connection.getRepository(Participant)
-            .createQueryBuilder('participant')
-            .select()
-            .offset(offset)
-            .limit(limit)
-            .getMany();
+    async getParticipants (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Participant, 'p', offset, limit);
     }
 
     async participantByEngagementId (id: number) {
@@ -84,18 +79,25 @@ export class ParticipantAPI extends DataSource {
             .getMany();
     }
 
-    async engagementByCargoBikeId (offset: number, limit: number, id: number) {
+    async engagementByCargoBikeId (id: number, offset?: number, limit?: number) {
+        if (limit === null || offset === null) {
+            return await this.connection.getRepository(Engagement)
+                .createQueryBuilder('engagement')
+                .select()
+                .where('engagement."cargoBikeId" = :id', { id: id })
+                .orderBy('engagement."dateRange"', 'DESC')
+                .getMany();
+        } else {
             return await this.connection.getRepository(Engagement)
                 .createQueryBuilder('engagement')
                 .select()
-            .where('engagement."cargoBikeId" = :id', {
-                id: id
-            })
+                .where('engagement."cargoBikeId" = :id', { id: id })
                 .skip(offset)
                 .take(limit)
                 .orderBy('engagement."dateRange"', 'DESC')
                 .getMany();
         }
+    }
 
     async currentEngagementByCargoBikeId (id: number) {
         return await this.connection.getRepository(Engagement)
@@ -107,13 +109,8 @@ export class ParticipantAPI extends DataSource {
             .getMany();
     }
 
-    async engagements (offset: number, limit: number) {
-        return await this.connection.getRepository(Engagement)
-            .createQueryBuilder('e')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async engagements (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Engagement, 'e', offset, limit);
     }
 
     async engagementById (id: number) {
@@ -132,13 +129,8 @@ export class ParticipantAPI extends DataSource {
             .getOne();
     }
 
-    async engagementTypes (offset: number, limit: number) {
-        return await this.connection.getRepository(EngagementType)
-            .createQueryBuilder('et')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async engagementTypes (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, EngagementType, 'et', offset, limit);
     }
 
     async engagementTypeByEngagementId (id: number) {
@@ -178,6 +170,7 @@ export class ParticipantAPI extends DataSource {
      * @param participant to be created
      */
     async createParticipant (participant: any) {
+        genDateRange(participant);
         let inserts: any;
         await this.connection.transaction(async (entityManager: EntityManager) => {
             inserts = await entityManager.getRepository(Participant)
@@ -187,7 +180,7 @@ export class ParticipantAPI extends DataSource {
                 .values([participant])
                 .returning('*')
                 .execute();
-            await entityManager.getRepository(Participant)
+            participant.workshopIds && await entityManager.getRepository(Participant)
                 .createQueryBuilder('w')
                 .relation(Participant, 'workshopIds')
                 .of(participant.id)
@@ -209,8 +202,9 @@ export class ParticipantAPI extends DataSource {
         delete participant.keepLock;
         await this.connection.transaction(async (entityManager: EntityManager) => {
             if (await LockUtils.isLocked(entityManager, Participant, 'p', participant.id, userId)) {
-                throw new GraphQLError('Participant is locked by another user');
+                throw new UserInputError('Attempting to update locked resource');
             }
+            genDateRange(participant);
             const workshops = participant.workshopIds;
             delete participant.workshopIds;
             await ActionLogger.log(entityManager, Participant, 'p', participant, userId);
@@ -219,8 +213,19 @@ export class ParticipantAPI extends DataSource {
                 .update()
                 .set({ ...participant })
                 .where('id = :id', { id: participant.id })
-                .execute().then(value => { if (value.affected !== 1) { throw new GraphQLError('ID not found'); } });
-            await entityManager.getRepository(Participant)
+                .execute().then(value => { if (value.affected !== 1) { throw new UserInputError('ID not found'); } });
+            // check for engagements before or after dateRange
+            const engagements = await entityManager.getRepository(Engagement)
+                .createQueryBuilder('e')
+                .select()
+                .where('e."participantId" = :pid', { pid: participant.id })
+                .andWhere('not :pdr @> e."dateRange"', { pdr: participant.dateRange })
+                .getMany();
+            if (engagements.length !== 0) {
+                throw new UserInputError('Engagements with ids: ' + engagements.map((e) => { return `${e.id} ,`; }) + ' are are outside of dataRange');
+            }
+            // add and remove workshop relations
+            workshops && await entityManager.getRepository(Participant)
                 .createQueryBuilder('w')
                 .relation(Participant, 'workshopIds')
                 .of(participant.id)
@@ -231,7 +236,7 @@ export class ParticipantAPI extends DataSource {
     }
 
     async deleteParticipant (id: number, userId: number) {
-        return await deleteEntity(this.connection, Participant, 'p', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Participant, 'p', id, userId);
     }
 
     async createEngagement (engagement: any) {
@@ -249,6 +254,16 @@ export class ParticipantAPI extends DataSource {
             if (overlapping.length > 0) {
                 throw new UserInputError('Engagements with ids: ' + overlapping.map((e) => { return e.id + ', '; }) + 'are overlapping');
             }
+            // check if participant is active
+            const participant = await entityManager.getRepository(Participant)
+                .createQueryBuilder('p')
+                .select()
+                .where('p.id = :pid', { pid: engagement.participantId })
+                .andWhere('not p."dateRange" @> :edr', { edr: engagement.dateRange })
+                .getOne();
+            if (participant) {
+                throw new UserInputError('Participant ist not active in the specified dateRange');
+            }
             inserts = await entityManager.getRepository(Engagement)
                 .createQueryBuilder('engagement')
                 .insert()
@@ -288,6 +303,20 @@ export class ParticipantAPI extends DataSource {
             if (overlapping.length > 0) {
                 throw new UserInputError('Engagements with ids: ' + overlapping.map((e) => { return e.id + ', '; }) + 'are overlapping');
             }
+            // check if participant is active
+            if (engagement.dateRange && engagement.participantId) {
+                const participant = await entityManager.getRepository(Participant)
+                    .createQueryBuilder('p')
+                    .select()
+                    .where('p.id = :pid', { pid: engagement.participantId })
+                    .andWhere('not p."dateRange" @> :edr', { edr: engagement.dateRange })
+                    .getOne();
+                if (participant) {
+                    throw new UserInputError('Participant ist not active in the specified dateRange');
+                }
+            } else if (engagement.dateRange || engagement.dateRange) {
+                throw new UserInputError('Please specify participantId adn the dateRange');
+            }
             await entityManager.getRepository(Engagement)
                 .createQueryBuilder('engagement')
                 .update()
@@ -300,7 +329,7 @@ export class ParticipantAPI extends DataSource {
     }
 
     async deleteEngagement (id: number, userId: number) {
-        return await deleteEntity(this.connection, Engagement, 'e', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Engagement, 'e', id, userId);
     }
 
     async createEngagementType (engagementType: any) {
@@ -342,6 +371,6 @@ export class ParticipantAPI extends DataSource {
     }
 
     async deleteEngagementType (id: number, userId: number) {
-        return await deleteEntity(this.connection, EngagementType, 'et', id, userId);
+        return await DBUtils.deleteEntity(this.connection, EngagementType, 'et', id, userId);
     }
 }

src/datasources/db/providerAPI.ts

@@ -24,7 +24,7 @@ import { Organisation } from '../../model/Organisation';
 import { UserInputError } from 'apollo-server-express';
 import { CargoBike } from '../../model/CargoBike';
 import { LendingStation } from '../../model/LendingStation';
-import { ActionLogger, deleteEntity, LockUtils } from './utils';
+import { ActionLogger, DBUtils, LockUtils } from './utils';
 import { GraphQLError } from 'graphql';
 
 export class ProviderAPI extends DataSource {
@@ -42,13 +42,8 @@ export class ProviderAPI extends DataSource {
             .getOne();
     }
 
-    async provider (offset: number, limit: number) {
-        return await this.connection.getRepository(Provider)
-            .createQueryBuilder('provider')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async provider (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Provider, 'p', offset, limit);
     }
 
     async providerByOrganisationId (id: number) {
@@ -75,13 +70,8 @@ export class ProviderAPI extends DataSource {
             .loadOne();
     }
 
-    async organisations (offset: number, limit: number) {
-        return await this.connection.getRepository(Organisation)
-            .createQueryBuilder('o')
-            .select()
-            .skip(offset)
-            .limit(limit)
-            .getMany();
+    async organisations (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Organisation, 'o', offset, limit);
     }
 
     async organisationById (id: number) {
@@ -180,7 +170,7 @@ export class ProviderAPI extends DataSource {
     }
 
     async deleteProvider (id: number, userId: number) {
-        return await deleteEntity(this.connection, Provider, 'p', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Provider, 'p', id, userId);
     }
 
     async createOrganisation (organisation: any) {
@@ -223,6 +213,6 @@ export class ProviderAPI extends DataSource {
     }
 
     async deleteOrganisation (id: number, userId: number) {
-        return await deleteEntity(this.connection, Organisation, 'o', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Organisation, 'o', id, userId);
     }
 }

src/datasources/db/utils.ts

@@ -23,34 +23,81 @@ import { ActionLog, Actions } from '../../model/ActionLog';
 import { UserInputError } from 'apollo-server-express';
 
 export function genDateRange (struct: any) {
-    if (struct.to === undefined) {
-        struct.to = '';
-    }
-    struct.dateRange = '[' + struct.from + ',' + struct.to + ')';
-    if (struct.from === undefined) {
+    if (!struct.dateRange || !struct.dateRange.from) {
         delete struct.dateRange;
+        return;
+    } else if (!struct.dateRange?.to) {
+        struct.dateRange.to = '';
+    } else if (struct.dateRange.to === struct.dateRange.from) {
+        throw new UserInputError('Date Range can not be empty, provide different dates.');
+    }
+    struct.dateRange = `[${struct.dateRange.from},${struct.dateRange.to})`;
 }
-    // delete these keys, so the struct can be used to update the engagement entity
-    delete struct.from;
-    delete struct.to;
+
+/**
+ * This function helps prepare the cargoBike struct, to be used in an update or create.
+ * It creates the numrange attributes than can be understood by postgres.
+ * @param range
+ */
+function genNumRange (range: { min: number, max: number}) :string {
+    if (!range || (!range.max && !range.min)) {
+        return null;
+    } else if (range.min === null || range.min === undefined) {
+        range.min = range.max;
+    } else if (range.max === null || range.max === undefined) {
+        range.max = range.min;
+    }
+    if (range.min < 0) {
+        throw new UserInputError('Minimal value must be greater or equal to 0');
+    }
+    return `[${range.min},${range.max}]`;
+}
+
+/**
+ * This function prepares the cargoBike struct, to be used in an update or create.
+ * It creates the numrange attributes than can be understood by postgres.
+ * @param cargoBike
+ */
+export function genBoxDimensions (cargoBike: any) {
+    if (!cargoBike.dimensionsAndLoad) { return; }
+    cargoBike.dimensionsAndLoad.boxLengthRange = genNumRange(cargoBike.dimensionsAndLoad.boxLengthRange);
+    cargoBike.dimensionsAndLoad.boxWidthRange = genNumRange(cargoBike.dimensionsAndLoad.boxWidthRange);
+    cargoBike.dimensionsAndLoad.boxHeightRange = genNumRange(cargoBike.dimensionsAndLoad.boxHeightRange);
 }
 
 /**
- * Can be used in resolvers to specify if entry is locked by other user.
+ * Can be used in resolvers to specify, if entry is locked by other user.
  * Returns true if locked by other user.
  * @param parent
- * @param dataSources
- * @param req user request
+ * @param req
  */
 export function isLocked (parent: any, { req }: { req: any }) {
     return req.userId !== parent.lockedBy && new Date() <= new Date(parent.lockedUntil);
 }
 
+/**
+ * Can be used in resolvers to specify, if entry is locked by the current user.
+ * @param parent
+ * @param req
+ */
 export function isLockedByMe (parent: any, { req }: { req: any }) {
     return req.userId === parent.lockedBy && new Date() <= new Date(parent.lockedUntil);
 }
 
-export async function deleteEntity (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number, userId: number): Promise<Boolean> {
+/**
+ * Some utility functions for the database
+ */
+export class DBUtils {
+    /**
+     * Delete any instance of an entity that implements the Lockable interface.
+     * It must implement the interface, so it can be be ensured, that the instance is not locked by another user.
+     * @param connection
+     * @param target
+     * @param alias
+     * @param id
+     * @param userId
+     */
+    static async deleteEntity (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number, userId: number): Promise<Boolean> {
         return await connection.transaction(async (entityManger: EntityManager) => {
             if (await LockUtils.isLocked(entityManger, target, alias, id, userId)) {
                 throw new UserInputError('Attempting to delete locked resource');
@@ -64,8 +111,48 @@ export async function deleteEntity (connection: Connection, target: ObjectType<L
         });
     }
 
+    /**
+     * Return all instances of the given entity called target.
+     * When offset or limit is not specified, both values are ignored.
+     * @param connection
+     * @param target
+     * @param alias
+     * @param offset
+     * @param limit
+     */
+    static async getAllEntity (connection: Connection, target: ObjectType<any>, alias: string, offset?: number, limit?: number) {
+        if (offset === null || limit === null) {
+            return await connection.getRepository(target)
+                .createQueryBuilder(alias)
+                .select()
+                .getMany();
+        } else {
+            return await connection.getRepository(target)
+                .createQueryBuilder(alias)
+                .select()
+                .skip(offset)
+                .take(limit)
+                .getMany();
+        }
+    }
+}
+
+/**
+ * Some static functions for the locking feature.
+ */
 export class LockUtils {
-    static async findById (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number): Promise<Lockable> {
+    /**
+     * A helper function to find an instance of any entity that implements Lockable.
+     * It will throw an error, if nothing is found.
+     * Using this function only makes sense to use in the context of locking because there is no point in locking
+     * an instance that does not exist.
+     * @param connection
+     * @param target
+     * @param alias
+     * @param id
+     * @private
+     */
+    private static async findById (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number): Promise<Lockable> {
         return await connection.getRepository(target)
             .createQueryBuilder(alias)
             .select()
@@ -75,6 +162,17 @@ export class LockUtils {
             });
     }
 
+    /**
+     * Lock an instance of an entity target that implements the Lockable interface and return that instance.
+     * If lock could not be set, it will still return the entity.
+     * If lock was set or not can be obtained by the field isLockedByMe in the graphql interface,
+     * or the the fields lockedBy and lockedUntil in the database.
+     * @param connection
+     * @param target
+     * @param alias
+     * @param id
+     * @param userId
+     */
     static async lockEntity (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number, userId: number): Promise<Lockable> {
         const lock = await connection.getRepository(target)
             .createQueryBuilder(alias)
@@ -103,6 +201,17 @@ export class LockUtils {
         return await this.findById(connection, target, alias, id);
     }
 
+    /**
+     * Unlock an instance of an entity target that implements the Lockable interface and return that instance.
+     * If lock could not be unset, it will still return the entity.
+     * If lock was set or not can be obtained by the field isLockedByMe in the graphql interface,
+     * or the the fields lockedBy and lockedUntil in the database.
+     * @param connection
+     * @param target
+     * @param alias
+     * @param id
+     * @param userId
+     */
     static async unlockEntity (connection: Connection, target: ObjectType<Lockable>, alias: string, id: number, userId: number): Promise<Lockable> {
         await connection.getRepository(target)
             .createQueryBuilder(alias)
@@ -145,7 +254,18 @@ export class LockUtils {
     }
 }
 
+/**
+ * Some utility function for the logging features.
+ */
 export class ActionLogger {
+    /**
+     * Create array of strings, that can be used to select them form the database.
+     * If you want to avoid logging all old values, for an update, but only the ones that are updated,
+     * use this function. If updates are null, ['*'] will be returned. Use this for delete actions.
+     * @param updates
+     * @param alias
+     * @private
+     */
     private static buildSelect (updates: any, alias: string) : string[] {
         // this hacky shit makes it possible to select subfields like the address or insurance data. Only one layer at the moment
         if (updates === null) {
@@ -156,15 +276,25 @@ export class ActionLogger {
             // sometimes updates[value] is an array, e.g. timePeriods that are saved as a simple array in postgres
             if (updates[value] && typeof updates[value] === 'object' && !Array.isArray(updates[value])) {
                 Object.keys(updates[value]).forEach(subValue => {
-                    ret.push(alias + '."' + value + subValue[0].toUpperCase() + subValue.substr(1).toLowerCase() + '"');
+                    ret.push(`${alias}."${value}${subValue[0].toUpperCase()}${subValue.substr(1).toLowerCase()}"`);
                 });
             } else {
-                ret.push(alias + '."' + value + '"');
+                ret.push(`${alias}."${value}"`);
             }
         });
         return ret;
     }
 
+    /**
+     * Insert an entry in the log. The log ist just another entity in the database.
+     * You can only use this in a transaction. So you have to pass an entity manager.
+     * @param em
+     * @param target
+     * @param alias
+     * @param updates
+     * @param userId
+     * @param action
+     */
     static async log (em: EntityManager, target: ObjectType<any>, alias: string, updates: any, userId: number, action: Actions = Actions.UPDATE) {
         const oldValues = await em.getRepository(target).createQueryBuilder(alias)
             .select(this.buildSelect(updates, alias))

src/datasources/db/workshopAPI.ts

@@ -21,7 +21,7 @@ import { DataSource } from 'apollo-datasource';
 import { Connection, EntityManager, getConnection } from 'typeorm';
 import { WorkshopType } from '../../model/WorkshopType';
 import { Workshop } from '../../model/Workshop';
-import { ActionLogger, deleteEntity, LockUtils } from './utils';
+import { ActionLogger, DBUtils, LockUtils } from './utils';
 import { UserInputError } from 'apollo-server-express';
 import { GraphQLError } from 'graphql';
 import { Participant } from '../../model/Participant';
@@ -73,7 +73,7 @@ export class WorkshopAPI extends DataSource {
     }
 
     async deleteWorkshop (id: number, userId: number) {
-        return await deleteEntity(this.connection, Workshop, 'w', id, userId);
+        return await DBUtils.deleteEntity(this.connection, Workshop, 'w', id, userId);
     }
 
     async createWorkshopType (workshopType: any) {
@@ -115,7 +115,7 @@ export class WorkshopAPI extends DataSource {
     }
 
     async deleteWorkshopType (id: number, userId: number) {
-        return await deleteEntity(this.connection, WorkshopType, 'wt', id, userId);
+        return await DBUtils.deleteEntity(this.connection, WorkshopType, 'wt', id, userId);
     }
 
     async workshopTypeById (id: number) {
@@ -126,13 +126,8 @@ export class WorkshopAPI extends DataSource {
             .getOne();
     }
 
-    async workshopTypes (offset: number, limit: number) {
-        return await this.connection.getRepository(WorkshopType)
-            .createQueryBuilder('w')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async workshopTypes (offset?: number, limit?: number) {
+        return DBUtils.getAllEntity(this.connection, WorkshopType, 'wt', offset, limit);
     }
 
     async workshopById (id: number) {
@@ -148,13 +143,8 @@ export class WorkshopAPI extends DataSource {
      * @param offset
      * @param limit
      */
-    async workshops (offset: number, limit: number) {
-        return await this.connection.getRepository(Workshop)
-            .createQueryBuilder('w')
-            .select()
-            .skip(offset)
-            .take(limit)
-            .getMany();
+    async workshops (offset?: number, limit?: number) {
+        return await DBUtils.getAllEntity(this.connection, Workshop, 'w', offset, limit);
     }
 
     async trainer1ByWorkshopId (id: number) {

src/model/CargoBike.ts

@@ -30,7 +30,6 @@ import {
     DeleteDateColumn
 } from 'typeorm';
 import { Provider } from './Provider';
-import { Participant } from './Participant';
 import { InsuranceData } from './InsuranceData';
 import { TimeFrame } from './TimeFrame';
 import { Taxes } from './Taxes';
@@ -66,7 +65,9 @@ export interface Lockable {
 }
 
 export class Security {
-    @Column()
+    @Column({
+        nullable: true
+    })
     frameNumber: string;
 
     @Column({
@@ -90,13 +91,19 @@ export class Security {
     adfcCoding: string;
 }
 export class TechnicalEquipment {
-    @Column()
+    @Column({
+        nullable: true
+    })
     bicycleShift: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     isEBike: boolean;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     hasLightSystem: boolean;
 
     @Column({
@@ -106,44 +113,55 @@ export class TechnicalEquipment {
 }
 
 export class DimensionsAndLoad {
-    @Column()
+    @Column({
+        nullable: true
+    })
     hasCoverBox: boolean;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     lockable:boolean;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxLength: number;
+    boxLengthRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxWidth: number;
+    boxWidthRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'numrange',
+        nullable: true
     })
-    boxHeight: number;
+    boxHeightRange: string;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
-    maxWeightBox: number;
+    maxWeightBox: string;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     maxWeightLuggageRack: number;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     maxWeightTotal: number;
 
     @Column({
-        type: 'decimal'
+        type: 'decimal',
+        nullable: true
     })
     bikeLength: number;
 
@@ -174,23 +192,27 @@ export class CargoBike implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @DeleteDateColumn()
-    deleteDate: Date;
-
     @Column({
         type: 'enum',
         enum: Group
     })
     group: Group;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     name: string;
 
+    @Column({
+        nullable: true
+    })
+    state: string;
+
     @OneToMany(type => Equipment, equipment => equipment.cargoBikeId, {
         nullable: true,
         eager: true
     })
-    equipment: Equipment[];
+    equipmentIds: number[];
 
     // Equipment that is not unique and is supposed to be selected out of a list e.g. drop down
     @ManyToMany(type => EquipmentType, equipmentType => equipmentType.cargoBikeIds)
@@ -245,19 +267,32 @@ export class CargoBike implements Lockable {
     })
     description: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     modelName: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     numberOfWheels: number;
 
-    @Column()
+    @Column({
+        type: 'boolean',
+        nullable: true
+    })
     forCargo: boolean;
 
-    @Column()
+    @Column({
+        type: 'boolean',
+        nullable: true
+    })
     forChildren: boolean;
 
-    @Column()
+    @Column({
+        type: 'int',
+        nullable: true
+    })
     numberOfChildren: number;
 
     @Column(type => TechnicalEquipment)
@@ -267,6 +302,7 @@ export class CargoBike implements Lockable {
     dimensionsAndLoad: DimensionsAndLoad;
 
     @Column({
+        type: 'int',
         nullable: true
     })
     lockedBy: number;

src/model/ContactInformation.ts

@@ -42,9 +42,7 @@ export class ContactInformation implements Lockable {
     })
     participantId: number;
 
-    @Column(type => {
-        return Address;
-    })
+    @Column(type => { return Address; })
     address: Address;
 
     @Column({

src/model/EngagementType.ts

@@ -26,7 +26,9 @@ export class EngagementType implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     name: string;
 
     @Column({

src/model/Equipment.ts

@@ -26,7 +26,9 @@ export class Equipment implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     serialNo: string;
 
     @Column()
@@ -37,7 +39,7 @@ export class Equipment implements Lockable {
     })
     description: string;
 
-    @ManyToOne(type => CargoBike, cargoBike => cargoBike.equipment, {
+    @ManyToOne(type => CargoBike, cargoBike => cargoBike.equipmentIds, {
         nullable: true
     })
     @JoinColumn({

src/model/EquipmentType.ts

@@ -25,7 +25,9 @@ export class EquipmentType implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     name: string;
 
     @Column({

src/model/InsuranceData.ts

@@ -20,22 +20,34 @@ This file is part of fLotte-API-Server.
 import { Column } from 'typeorm';
 
 export class InsuranceData {
-    @Column()
+    @Column({
+        nullable: true
+    })
     name: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     benefactor: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     billing: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     noPnP: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     maintenanceResponsible: string;
 
-    @Column()
+    @Column({
+        nullable: true
+    })
     maintenanceBenefactor: string;
 
     @Column({

src/model/LendingStation.ts

@@ -34,6 +34,12 @@ export class LoanPeriod {
     })
     from: Date;
 
+    @Column({
+        nullable: true,
+        type: 'text'
+    })
+    generalRemark: string;
+
     /**
      * validity for loanPeriods
      */
@@ -44,10 +50,39 @@ export class LoanPeriod {
     to: Date;
 
     @Column({
-        type: 'simple-array',
         nullable: true
     })
-    loanTimes: string[];
+    mo: string;
+
+    @Column({
+        nullable: true
+    })
+    tu: string;
+
+    @Column({
+        nullable: true
+    })
+    we: string;
+
+    @Column({
+        nullable: true
+    })
+    th: string;
+
+    @Column({
+        nullable: true
+    })
+    fr: string;
+
+    @Column({
+        nullable: true
+    })
+    sa: string;
+
+    @Column({
+        nullable: true
+    })
+    su: string;
 }
 
 @Entity()

src/model/Organisation.ts

@@ -28,7 +28,9 @@ export class Organisation implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     name: string;
 
     @OneToMany(type => LendingStation, lendingStation => lendingStation.organisationId)

src/model/Participant.ts

@@ -29,16 +29,9 @@ export class Participant implements Lockable {
     id: number;
 
     @Column({
-        type: 'date',
-        default: () => 'CURRENT_DATE'
+        type: 'daterange'
     })
-    start: Date;
-
-    @Column({
-        type: 'date',
-        nullable: true
-    })
-    end: Date;
+    dateRange: Date[];
 
     @OneToOne(type => ContactInformation, contactInformation => contactInformation.participantId, {
         nullable: false

src/model/Person.ts

@@ -18,10 +18,11 @@ This file is part of fLotte-API-Server.
 */
 
 import { Lockable } from './CargoBike';
-import { Column, Entity, OneToMany, PrimaryGeneratedColumn } from 'typeorm';
+import { Column, Entity, OneToMany, PrimaryGeneratedColumn, Unique } from 'typeorm';
 import { ContactInformation } from './ContactInformation';
 
 @Entity()
+@Unique(['firstName', 'name'])
 export class Person implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;

src/model/Taxes.ts

@@ -25,7 +25,9 @@ export enum OrganisationArea {
     ZB = 'ZB'
 }
 export class Taxes {
-    @Column()
+    @Column({
+        nullable: true
+    })
     costCenter: string;
 
     @Column({

src/model/WorkshopType.ts

@@ -26,7 +26,9 @@ export class WorkshopType implements Lockable {
     @PrimaryGeneratedColumn()
     id: number;
 
-    @Column()
+    @Column({
+        unique: true
+    })
     name: string;
 
     @OneToMany(type => Workshop, workshop => workshop.workshopTypeId)

src/resolvers/cargoBikeResolver.ts

@@ -30,14 +30,14 @@ export default {
                 throw new PermissionError();
             }
         },
-        cargoBikes: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        cargoBikes: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadBike)) {
                 return dataSources.cargoBikeAPI.getCargoBikes(offset, limit);
             } else {
                 throw new PermissionError();
             }
         },
-        bikeEvents: (_:any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        bikeEvents: (_:any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadBikeEvent)) {
                 return dataSources.cargoBikeAPI.bikeEvents(offset, limit);
             } else {
@@ -58,14 +58,14 @@ export default {
                 throw new PermissionError();
             }
         },
-        bikeEventTypes: (_:any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        bikeEventTypes: (_:any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadBikeEvent)) {
                 return dataSources.cargoBikeAPI.bikeEventTypes(offset, limit);
             } else {
                 throw new PermissionError();
             }
         },
-        equipment: (_:any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        equipment: (_:any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadEquipment)) {
                 return dataSources.cargoBikeAPI.getEquipment(offset, limit);
             } else {
@@ -79,7 +79,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        equipmentTypes: (_:any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        equipmentTypes: (_:any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadEquipment)) {
                 return dataSources.cargoBikeAPI.equipmentTypes(offset, limit);
             } else {
@@ -102,23 +102,23 @@ export default {
                 throw new PermissionError();
             }
         },
-        engagement (parent: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) {
+        engagement (parent: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadEngagement)) {
-                return dataSources.participantAPI.engagementByCargoBikeId(offset, limit, parent.id);
+                return dataSources.participantAPI.engagementByCargoBikeId(parent.id, offset, limit);
             } else {
                 throw new PermissionError();
             }
         },
-        participants (parent: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) { // TODO should be done with engagements
+        participants (parent: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) { // TODO should be done with engagements
             if (req.permissions.includes(Permission.ReadParticipant)) {
                 return dataSources.participantAPI.participantsByCargoBikeId(parent.id);
             } else {
                 throw new PermissionError();
             }
         },
-        equipment (parent: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) {
+        equipment (parent: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadEquipment)) {
-                return dataSources.cargoBikeAPI.equipmentByCargoBikeId(offset, limit, parent.id);
+                return dataSources.cargoBikeAPI.equipmentByCargoBikeId(parent.id, offset, limit);
             } else {
                 throw new PermissionError();
             }
@@ -130,15 +130,13 @@ export default {
                 throw new PermissionError();
             }
         },
-        bikeEvents (parent: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) {
+        bikeEvents (parent: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadBikeEvent)) {
                 return dataSources.cargoBikeAPI.bikeEventsByCargoBikeId(parent.id, offset, limit);
             } else {
                 throw new PermissionError();
             }
         },
-        isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
-        isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req }),
         timeFrames (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadTimeFrame)) {
                 return dataSources.lendingStationAPI.timeFramesByCargoBikeId(parent.id);
@@ -159,8 +157,17 @@ export default {
             } else {
                 throw new PermissionError();
             }
+        },
+        isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
+        isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
+    },
+    NumRange: {
+        min: (parent: string) => {
+            return parent.replace(/^\[(.*),.*]$/, '$1');
+        },
+        max: (parent: string) => {
+            return parent.replace(/^\[.*,(.*)]$/, '$1');
         }
-
     },
     Equipment: {
         cargoBike (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
@@ -173,6 +180,10 @@ export default {
         isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
         isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
     },
+    EquipmentType: {
+        isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
+        isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
+    },
     BikeEvent: {
         cargoBike (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadBike)) {
@@ -212,7 +223,7 @@ export default {
     Mutation: {
         createCargoBike: (_: any, { cargoBike }: { cargoBike: any }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.WriteBike)) {
-                return dataSources.cargoBikeAPI.createCargoBike({ cargoBike });
+                return dataSources.cargoBikeAPI.createCargoBike(cargoBike);
             } else {
                 throw new PermissionError();
             }

src/resolvers/contactInformationResolvers.ts

@@ -24,7 +24,7 @@ import { PermissionError } from '../errors/PermissionError';
 
 export default {
     Query: {
-        contactInformation: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        contactInformation: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadPerson)) {
                 return dataSources.contactInformationAPI.contactInformation(offset, limit);
             } else {
@@ -45,7 +45,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        persons: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        persons: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadPerson)) {
                 return dataSources.contactInformationAPI.persons(offset, limit);
             } else {

src/resolvers/lendingStationResolvers.ts

@@ -31,7 +31,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        lendingStations: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        lendingStations: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadLendingStation)) {
                 return dataSources.lendingStationAPI.lendingStations(offset, limit);
             } else {
@@ -45,7 +45,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        timeFrames: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        timeFrames: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadTimeFrame)) {
                 return dataSources.lendingStationAPI.timeFrames(offset, limit);
             } else {
@@ -99,19 +99,15 @@ export default {
         isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
         isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
     },
-    LoanPeriod: {
-        loanTimes  (parent: any) {
-            return parent.loanTimes ? parent.loanTimes : [];
+    DateRange: {
+        from (parent: string) {
+            return parent.replace(/^\[(.*),.*\)$/, '$1');
+        },
+        to (parent: string) {
+            return parent.replace(/^\[.*,(.*)\)$/, '$1');
         }
     },
     TimeFrame: {
-        from (parent: any) {
-            return (parent.dateRange as string).split(',')[0].replace('[', '');
-        },
-        to (parent: any) {
-            const str = (parent.dateRange as string).split(',')[1].replace(')', '');
-            return (str.length > 0) ? str : null;
-        },
         cargoBike (parent: any, __: any, { dataSources, req }: { dataSources: any, req: any }) {
             if (req.permissions.includes(Permission.ReadBike)) {
                 return dataSources.cargoBikeAPI.cargoBikeByTimeFrameId(parent.id);

src/resolvers/participantResolvers.ts

@@ -30,7 +30,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        participants: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        participants: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadParticipant)) {
                 return dataSources.participantAPI.getParticipants(offset, limit);
             } else {
@@ -44,7 +44,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        engagements: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        engagements: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadEngagement)) {
                 return dataSources.participantAPI.engagements(offset, limit);
             } else {
@@ -58,7 +58,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        engagementTypes: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        engagementTypes: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadEngagement)) {
                 return dataSources.participantAPI.engagementTypes(offset, limit);
             } else {
@@ -113,13 +113,6 @@ export default {
                 throw new PermissionError();
             }
         },
-        from (parent: any) {
-            return (parent.dateRange as string).split(',')[0].replace('[', '');
-        },
-        to (parent: any) {
-            const str = (parent.dateRange as string).split(',')[1].replace(')', '');
-            return (str.length > 0) ? str : null;
-        },
         isLockedByMe: (parent: any, __: any, { req }: { req: any }) => isLockedByMe(parent, { req }),
         isLocked: (parent: any, __: any, { req }: { req: any }) => isLocked(parent, { req })
     },

src/resolvers/providerResolvers.ts

@@ -23,7 +23,7 @@ import { PermissionError } from '../errors/PermissionError';
 
 export default {
     Query: {
-        providers: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        providers: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadProvider)) {
                 return dataSources.providerAPI.provider(offset, limit);
             } else {
@@ -37,7 +37,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        organisations: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        organisations: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadOrganisation)) {
                 return dataSources.providerAPI.organisations(offset, limit);
             } else {

src/resolvers/workshopResolvers.ts

@@ -31,7 +31,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        workshopTypes: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        workshopTypes: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadWorkshop)) {
                 return dataSources.workshopAPI.workshopTypes(offset, limit);
             } else {
@@ -45,7 +45,7 @@ export default {
                 throw new PermissionError();
             }
         },
-        workshops: (_: any, { offset, limit }: { offset: number, limit: number }, { dataSources, req }: { dataSources: any, req: any }) => {
+        workshops: (_: any, { offset, limit }: { offset?: number, limit?: number }, { dataSources, req }: { dataSources: any, req: any }) => {
             if (req.permissions.includes(Permission.ReadWorkshop)) {
                 return dataSources.workshopAPI.workshops(offset, limit);
             } else {

src/schema/type-defs.ts

@@ -21,27 +21,38 @@ import { gql } from 'apollo-server-express';
 
 export default gql`
 
-    "timestamp object YYYY-MM-ddThh:mm:ss.sssZ"
+    "date object YYYY-MM-dd"
     scalar Date
+    "timestamp object YYYY-MM-ddThh:mm:ss.sssZ"
+    scalar DateTime
     "only time hh-mm-ss"
     scalar Time
+    """
+    is of american format [-]$[0-9]+.[0-9][0-9]
+    commas every three digits and . for decimals with 2 digits after the .
+    There can be a leading  -.
+    There is a currency signe at the first position or second position if - is set.
+    The kind of currency depends on the database.
+    """
+    scalar Money
     
     "The CargoBike type is central to the graph. You could call it the root."
     type CargoBike {
         id: ID!
         "see column A in info tabelle"
-        group: Group
-        name: String
+        group: Group!
+        name: String!
+        state: BikeState
         modelName: String
         numberOfWheels: Int
         forCargo: Boolean
         forChildren: Boolean
-        numberOfChildren: Int!
+        numberOfChildren: Int
         """
         Safety is a custom type, that stores information about security features.
         TODO: Should this be called Security?
         """
-        security: Security!
+        security: Security
         """
         Does not refer to an extra table in the database.
         """
@@ -49,9 +60,11 @@ export default gql`
         """
         Does not refer to an extra table in the database.
         """
-        dimensionsAndLoad: DimensionsAndLoad!
+        dimensionsAndLoad: DimensionsAndLoad
+        "If offset or limit is not provided, both values are ignored"
         bikeEvents(offset: Int, limit: Int): [BikeEvent]
-        equipment(offset: Int!, limit: Int!): [Equipment]
+        "If offset or limit is not provided, both values are ignored"
+        equipment(offset: Int, limit: Int): [Equipment]
         "Refers to equipment that is not unique. See kommentierte info tabelle -> Fragen -> Frage 2"
         equipmentType: [EquipmentType]
         "Sticker State"
@@ -60,17 +73,27 @@ export default gql`
         provider: Provider
         "all participants currently engaged with the cargoBike"
         participants:  [Participant]
-        insuranceData: InsuranceData!
+        insuranceData: InsuranceData
         lendingStation: LendingStation
         taxes: Taxes
         currentEngagements: [Engagement]
-        engagement(offset: Int!, limit: Int!): [Engagement]
+        "If offset or limit is not provided, both values are ignored"
+        engagement(offset: Int, limit: Int): [Engagement]
         timeFrames: [TimeFrame]
         isLocked: Boolean!
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
+    }
+
+    """
+    Status of the CargoBike. More fields will be added, or removed.
+    """
+    enum BikeState {
+        ACTIVE
+        INACTIVE
+        INPREPARATION
     }
     
     """
@@ -80,42 +103,52 @@ export default gql`
         "see column A in info tabelle"
         group: Group!
         name: String!
-        modelName: String!
-        numberOfWheels: Int!
-        forCargo: Boolean!
-        forChildren: Boolean!
-        numberOfChildren: Int!
+        state: BikeState
+        modelName: String
+        numberOfWheels: Int
+        forCargo: Boolean
+        forChildren: Boolean
+        numberOfChildren: Int
         """
         Safety is a custom type, that stores information about security features.
-        TODO: Should this be called Security?
         """
-        security: SecurityCreateInput!
+        security: SecurityCreateInput
         """
         Does not refer to an extra table in the database.
         """
-        technicalEquipment: TechnicalEquipmentCreateInput!
+        technicalEquipment: TechnicalEquipmentCreateInput
         """
         Does not refer to an extra table in the database.
         """
-        dimensionsAndLoad: DimensionsAndLoadCreateInput!
-        "Refers to equipment that is not unique. See kommentierte info tabelle -> Fragen -> Frage 2"
+        dimensionsAndLoad: DimensionsAndLoadCreateInput
+        """
+        Refers to equipment that is not unique. See kommentierte info tabelle -> Fragen -> Frage 2
+        When set to null or [], no relations will be added.
+        """
         equipmentTypeIds: [ID]
+        """
+        Refers to unique equipment
+        When set to null or [], no relations will be added.
+        When specified id is in a relation with another bike, this relation will be deleted.
+        """
+        equipmentIds: [ID]
         "Sticker State"
         stickerBikeNameState: StickerBikeNameState
         note: String
         providerId: ID
-        insuranceData: InsuranceDataCreateInput!
-        taxes: TaxesCreateInput!
+        insuranceData: InsuranceDataCreateInput
+        taxes: TaxesCreateInput
     }
 
     """
-    if you want to add bike to a lending station, create a new timeFrame with to: Date = null
+    If you want to add bike to a lending station, create a new timeFrame with to: Date = null
     """
     input CargoBikeUpdateInput {
         id: ID!
         "see column A in info tabelle"
         group: Group
         name: String
+        state: BikeState
         modelName: String
         numberOfWheels: Int
         forCargo: Boolean
@@ -123,7 +156,6 @@ export default gql`
         numberOfChildren: Int
         """
         Safety is a custom type, that stores information about security features.
-        TODO: Should this be called Security?
         """
         security: SecurityUpdateInput
         """
@@ -136,9 +168,19 @@ export default gql`
         dimensionsAndLoad: DimensionsAndLoadUpdateInput
         """
         Refers to equipment that is not unique. See kommentierte info tabelle -> Fragen -> Frage 2
-        If set, ols relations will be over written. Set [] to delete all
+        When set to null, field will be ignored.
+        When set to [], all relations will be deleted.
+        Else all realtions will be deleted and the specified relations will be added.
         """
         equipmentTypeIds: [ID]
+        """
+        Refers to unique equipment
+        When set to null, field will be ignored.
+        When set to [], all relations will be deleted.
+        Else all realtions will be deleted and the specified relations will be added.
+        When specified id is in a relation with another bike, this relation will be deleted.
+        """
+        equipmentIds: [ID]
         "Sticker State"
         stickerBikeNameState: StickerBikeNameState
         note: String
@@ -153,15 +195,15 @@ export default gql`
         """
         Eventually, this field will become an enum or a separate data table and user can choose from a pool of insurance companies.
         """
-        name: String!
-        benefactor: String!
-        billing: String!
-        noPnP: String!
+        name: String
+        benefactor: String
+        billing: String
+        noPnP: String
         "eg. Anbieter, flotte, eigenleistung"
-        maintenanceResponsible: String!
-        maintenanceBenefactor: String!
+        maintenanceResponsible: String
+        maintenanceBenefactor: String
         maintenanceAgreement: String
-        hasFixedRate: Boolean!
+        hasFixedRate: Boolean
         fixedRate: Float
         """
         Projektzuschuss:
@@ -171,7 +213,7 @@ export default gql`
         There is a currency signe at the first position or second position if - is set.
         The kind of currency depends on the database.
         """
-        projectAllowance: String
+        projectAllowance: Money
         notes: String
     }
 
@@ -179,15 +221,15 @@ export default gql`
         """
         Eventually, this field will become an enum or a separate data table and user can choose from a pool of insurance companies.
         """
-        name: String!
-        benefactor: String!
-        billing: String!
-        noPnP: String!
+        name: String
+        benefactor: String
+        billing: String
+        noPnP: String
         "eg. Anbieter, flotte, eigenleistung"
-        maintenanceResponsible: String!
-        maintenanceBenefactor: String!
+        maintenanceResponsible: String
+        maintenanceBenefactor: String
         maintenanceAgreement: String
-        hasFixedRate: Boolean!
+        hasFixedRate: Boolean
         fixedRate: Float
         """
         Projektzuschuss:
@@ -197,7 +239,7 @@ export default gql`
         You can pass a currency signe at the first position or second position of + or - is set.
         The kind of currency depends on the database.
         """
-        projectAllowance: String
+        projectAllowance: Money
         notes: String
     }
 
@@ -223,37 +265,51 @@ export default gql`
         You can pass a currency signe at the first position or second position of + or - is set.
         The kind of currency depends on the database.
         """
-        projectAllowance: String
+        projectAllowance: Money
         notes: String
     }
 
+    type NumRange {
+        min: Float
+        max: Float
+    }
+    
+    """
+    If min or max is omitted, the omitted value will be the same as the other given value
+    So if you pass one as null, both values with be over written with null.
+    """
+    input NumRangeInput {
+        min: Float
+        max: Float
+    }
+    
     "How are the dimensions and how much weight can handle a bike. This data is merged in the CargoBike table and the BikeModel table."
     type DimensionsAndLoad {
-        hasCoverBox: Boolean!
+        hasCoverBox: Boolean
         "cover box can be locked"
-        lockable: Boolean!
-        boxLength: Float!
-        boxWidth: Float!
-        boxHeight: Float!
-        maxWeightBox: Float!
-        maxWeightLuggageRack: Float!
-        maxWeightTotal: Float!
-        bikeLength: Float!
+        lockable: Boolean
+        boxLengthRange: NumRange
+        boxWidthRange: NumRange
+        boxHeightRange: NumRange
+        maxWeightBox: Float
+        maxWeightLuggageRack: Float
+        maxWeightTotal: Float
+        bikeLength: Float
         bikeWidth: Float
         bikeHeight: Float
         bikeWeight: Float
     }
 
     input DimensionsAndLoadCreateInput {
-        hasCoverBox: Boolean!
-        lockable: Boolean!
-        boxLength: Float!
-        boxWidth: Float!
-        boxHeight: Float!
-        maxWeightBox: Float!
-        maxWeightLuggageRack: Float!
-        maxWeightTotal: Float!
-        bikeLength: Float!
+        hasCoverBox: Boolean
+        lockable: Boolean
+        boxLengthRange: NumRangeInput
+        boxWidthRange: NumRangeInput
+        boxHeightRange: NumRangeInput
+        maxWeightBox: Float
+        maxWeightLuggageRack: Float
+        maxWeightTotal: Float
+        bikeLength: Float
         bikeWidth: Float
         bikeHeight: Float
         bikeWeight: Float
@@ -262,9 +318,9 @@ export default gql`
     input DimensionsAndLoadUpdateInput {
         hasCoverBox: Boolean
         lockable: Boolean
-        boxLength: Float
-        boxWidth: Float
-        boxHeight: Float
+        boxLengthRange: NumRangeInput
+        boxWidthRange: NumRangeInput
+        boxHeightRange: NumRangeInput
         maxWeightBox: Float
         maxWeightLuggageRack: Float
         maxWeightTotal: Float
@@ -280,16 +336,16 @@ export default gql`
     So no id needed for mutation. One Mutation for the CargoBike will be enough.
     """
     type TechnicalEquipment {
-        bicycleShift: String!
-        isEBike: Boolean!
-        hasLightSystem: Boolean!
+        bicycleShift: String
+        isEBike: Boolean
+        hasLightSystem: Boolean
         specialFeatures: String
     }
 
     input TechnicalEquipmentCreateInput {
-        bicycleShift: String!
-        isEBike: Boolean!
-        hasLightSystem: Boolean!
+        bicycleShift: String
+        isEBike: Boolean
+        hasLightSystem: Boolean
         specialFeatures: String
     }
 
@@ -306,7 +362,7 @@ export default gql`
     So no id needed for mutation. One Mutation for the CargoBike will be enough.
     """
     type Security {
-        frameNumber: String!
+        frameNumber: String
         keyNumberFrameLock: String
         keyNumberAXAChain: String
         policeCoding: String
@@ -314,7 +370,7 @@ export default gql`
     }
 
     input SecurityCreateInput {
-        frameNumber: String!
+        frameNumber: String
         keyNumberFrameLock: String
         keyNumberAXAChain: String
         policeCoding: String
@@ -354,8 +410,7 @@ export default gql`
     """
     type Participant {
         id: ID!
-        start: Date!
-        end: Date
+        dateRange: DateRange!
         contactInformation: ContactInformation!
         usernamefLotte: String
         usernameSlack: String
@@ -375,13 +430,12 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input ParticipantCreateInput {
         "if not set, CURRENT_DATE will be used"
-        start: Date
-        end: Date
+        dateRange: DateRangeInput!
         "must create contactinformation first, if you want to use new"
         contactInformationId: ID!
         usernamefLotte: String
@@ -396,9 +450,7 @@ export default gql`
 
     input ParticipantUpdateInput {
         id: ID!
-        "if not set, CURRENT_DATE will be used"
-        start: Date
-        end: Date
+        dateRange: DateRangeInput
         "must create contactinformation first, if you want to use new"
         contactInformationId: ID
         usernamefLotte: String
@@ -428,7 +480,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input WorkshopCreateInput {
@@ -458,7 +510,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input WorkshopTypeCreateInput {
@@ -478,7 +530,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input EngagementTypeCreateInput {
@@ -496,43 +548,38 @@ export default gql`
     type Engagement {
         id: ID!
         engagementType: EngagementType!
-        from: Date!
-        to: Date
+        dateRange: DateRange!
         participant: Participant!
         cargoBike: CargoBike!
         isLocked: Boolean!
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input EngagementCreateInput {
         engagementTypeId: ID!
-        "will use CURRENT_DATE if not set"
-        from: Date
-        "will use infinit if not set"
-        to: Date
+        dateRange: DateRangeInput!
         participantId: ID!
         cargoBikeId: ID!
     }
     input EngagementUpdateInput {
         id: ID!
         engagementTypeId: ID
-        from: Date
-        to: Date
+        dateRange: DateRangeInput
         participantId: ID
         cargoBikeId: ID
         keepLock: Boolean
     }
 
     type Taxes {
-        costCenter: String!
+        costCenter: String
         organisationArea: OrganisationArea
     }
 
     input TaxesCreateInput {
-        costCenter: String!
+        costCenter: String
         organisationArea: OrganisationArea
     }
 
@@ -560,7 +607,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input EquipmentCreateInput {
@@ -592,11 +639,11 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input EquipmentTypeCreateInput {
-        name: String
+        name: String!
         description: String
     }
 
@@ -607,7 +654,7 @@ export default gql`
         keepLock: Boolean
     }
 
-    "An Event is a point in time, when the state of the bike somehow changed."
+    "An Event is a point in time concerning one cargo bike of an event type. For example a chain swap."
     type BikeEvent {
         id: ID!
         bikeEventType: BikeEventType!
@@ -625,7 +672,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input BikeEventCreateInput {
@@ -663,7 +710,9 @@ export default gql`
         name: String!
         isLockedByMe: Boolean!
         isLocked: Boolean!
-        lockedUntil: Date
+        "null if not locked by other user"
+        lockedBy: ID
+        lockedUntil: DateTime
     }
 
     input BikeEventTypeUpdateInput {
@@ -683,7 +732,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     "(dt. Anbieter)"
@@ -717,7 +766,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input PersonCreateInput {
@@ -744,7 +793,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input ContactInformationCreateInput {
@@ -784,7 +833,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input OrganisationCreateInput {
@@ -828,7 +877,7 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     """
@@ -862,13 +911,13 @@ export default gql`
     """
     type LoanPeriod {
         generalRemark: String
-        "notes for each day of the week, starting on Monday"
-        notes: [String]
-        """
-        Loan times from and until for each day of the week.
-        Starting with Monday from, Monday to, Tuesday from, ..., Sunday to
-        """
-        loanTimes: [String]
+        mo: String
+        tu: String
+        we: String
+        th: String
+        fr: String
+        sa: String
+        su: String
     }
 
     """
@@ -876,22 +925,35 @@ export default gql`
     """
     input LoanPeriodInput {
         generalRemark: String
-        "notes for each day of the week, starting on Monday"
-        notes: [String!]
+        mo: String
+        tu: String
+        we: String
+        th: String
+        fr: String
+        sa: String
+        su: String
+    }
+
+    type DateRange{
+        from: Date!
+        "will be infinity of not omitted"
+        to: Date
+    }
+    
+    input DateRangeInput {
+        "format YYYY-MM-dd"
+        from: Date!
         """
-        Loan times from and until for each day of the week.
-        Starting with Monday from, Monday to, Tuesday from, ..., Sunday to
+        format YYYY-MM-dd
+        will be infinity of not omitted
         """
-        loanTimes: [String!]
+        to: Date
     }
     
     "(dt. Zeitscheibe) When was a bike where"
     type TimeFrame {
         id: ID!
-        "format YYYY-MM-dd"
-        from: Date!
-        "format YYYY-MM-dd"
-        to: Date
+        dateRange: DateRange!
         note: String
         lendingStation: LendingStation!
         cargoBike: CargoBike!
@@ -899,12 +961,11 @@ export default gql`
         isLockedByMe: Boolean!
         "null if not locked by other user"
         lockedBy: ID
-        lockedUntil: Date
+        lockedUntil: DateTime
     }
 
     input TimeFrameCreateInput {
-        from: Date!
-        to: Date
+        dateRange: DateRangeInput!
         note: String
         lendingStationId: ID!
         cargoBikeId: ID!
@@ -912,8 +973,7 @@ export default gql`
 
     input TimeFrameUpdateInput {
         id: ID!
-        from: Date
-        to: Date
+        dateRange: DateRangeInput
         note: String
         lendingStationId: ID
         cargoBikeId: ID
@@ -953,41 +1013,55 @@ export default gql`
     type Query {
         "Will (eventually) return all properties of cargo bike"
         cargoBikeById(id:ID!): CargoBike
-        "returns cargoBikes ordered by name ascending, relations are not loaded, use cargoBikeById instead"
-        cargoBikes(offset: Int!, limit: Int!): [CargoBike!]!
+        "Returns cargoBikes ordered by name ascending. If offset or limit is not provided, both values are ignored."
+        cargoBikes(offset: Int, limit: Int): [CargoBike!]!
         engagementById(id: ID!): Engagement
-        engagements(offset: Int!, limit: Int!): [Engagement!]!
+        "If offset or limit is not provided, both values are ignored"
+        engagements(offset: Int, limit: Int): [Engagement!]!
         engagementTypeById(id: ID!): EngagementType
-        engagementTypes(offset: Int!, limit: Int!): [EngagementType!]!
+        "If offset or limit is not provided, both values are ignored"
+        engagementTypes(offset: Int, limit: Int): [EngagementType!]!
         "equipment by id, will return null if id not found"
         equipmentById(id: ID!): Equipment
-        equipment(offset: Int!, limit: Int!): [Equipment!]!
+        "If offset or limit is not provided, both values are ignored"
+        equipment(offset: Int, limit: Int): [Equipment!]!
         equipmentTypeById(id: ID!): EquipmentType
-        equipmentTypes(offset: Int!, limit: Int!): [EquipmentType!]!
+        "If offset or limit is not provided, both values are ignored"
+        equipmentTypes(offset: Int, limit: Int): [EquipmentType!]!
         "return null if id not found"
         providerById(id:ID!): Provider
-        "Returns providers with pagination"
-        providers(offset: Int!, limit: Int!): [Provider!]!
+        "Returns providers with pagination. If offset or limit is not provided, both values are ignored"
+        providers(offset: Int, limit: Int): [Provider!]!
         "participant by id"
         participantById(id:ID!):  Participant
-        participants(offset: Int!, limit: Int!): [Participant!]!
+        "If offset or limit is not provided, both values are ignored"
+        participants(offset: Int, limit: Int): [Participant!]!
         workshopTypeById(id: ID!): WorkshopType
-        workshopTypes(offset: Int!, limit: Int!): [WorkshopType!]!
+        "If offset or limit is not provided, both values are ignored"
+        workshopTypes(offset: Int, limit: Int): [WorkshopType!]!
         workshopById(id: ID!): Workshop
-        workshops(offset: Int!, limit: Int!): [Workshop!]!
+        "If offset or limit is not provided, both values are ignored"
+        workshops(offset: Int, limit: Int): [Workshop!]!
         lendingStationById(id:ID!): LendingStation
-        lendingStations(offset: Int!, limit: Int!): [LendingStation!]!
+        "If offset or limit is not provided, both values are ignored"
+        lendingStations(offset: Int, limit: Int): [LendingStation!]!
         organisationById(id: ID!): Organisation
-        organisations(offset: Int!, limit: Int!): [Organisation!]!
+        "If offset or limit is not provided, both values are ignored"
+        organisations(offset: Int, limit: Int): [Organisation!]!
         timeFrameById(id: ID!): TimeFrame
-        timeFrames(offset: Int!, limit: Int!): [TimeFrame!]!
+        "If offset or limit is not provided, both values are ignored"
+        timeFrames(offset: Int, limit: Int): [TimeFrame!]!
         contactInformationById(id: ID!): ContactInformation
-        contactInformation(offset: Int!, limit: Int!): [ContactInformation!]!
+        "If offset or limit is not provided, both values are ignored"
+        contactInformation(offset: Int, limit: Int): [ContactInformation!]!
         personById(id: ID!): Person
-        persons(offset: Int!, limit: Int!): [Person!]
-        bikeEventTypes(offset: Int!, limit: Int!): [BikeEventType!]
+        "If offset or limit is not provided, both values are ignored"
+        persons(offset: Int, limit: Int): [Person!]
+        "If offset or limit is not provided, both values are ignored"
+        bikeEventTypes(offset: Int, limit: Int): [BikeEventType!]
         bikeEventTypeByd(id: ID!): BikeEventType
-        bikeEvents(offset: Int!, limit: Int!): [BikeEvent!]!
+        "If offset or limit is not provided, both values are ignored"
+        bikeEvents(offset: Int, limit: Int): [BikeEvent!]!
         bikeEventById(id:ID!): BikeEvent
         "actionLog for current user"
         actionLog: [ActionLog!]
@@ -1062,23 +1136,23 @@ export default gql`
         """
         createParticipant(participant: ParticipantCreateInput!): Participant!
         lockParticipant(id: ID!): Participant!
-        unlockParticipant(id: ID!): Boolean
+        unlockParticipant(id: ID!): Participant
         updateParticipant(participant: ParticipantUpdateInput!): Participant!
         deleteParticipant(id: ID!): Boolean!
         createWorkshopType(workshopType: WorkshopTypeCreateInput!): WorkshopType!
         lockWorkshopType(id: ID!): WorkshopType!
-        unlockWorkshopType(id: ID!): Boolean!
+        unlockWorkshopType(id: ID!): WorkshopType!
         updateWorkshopType(workshopType: WorkshopTypeUpdateInput!): WorkshopType!
         deleteWorkshopType(id: ID!): Boolean!
         createWorkshop(workshop: WorkshopCreateInput!): Workshop!
         lockWorkshop(id: ID!): Workshop!
-        unlockWorkshop(id: ID!): Boolean!
+        unlockWorkshop(id: ID!): Workshop!
         updateWorkshop(workshop: WorkshopUpdateInput!): Workshop!
         deleteWorkshop(id: ID!): Boolean!
         "create new contactInfo"
         createContactInformation(contactInformation: ContactInformationCreateInput!): ContactInformation!
         lockContactInformation(id: ID!): ContactInformation!
-        unlockContactInformation(id: ID!): Boolean!
+        unlockContactInformation(id: ID!): ContactInformation!
         updateContactInformation(contactInformation: ContactInformationUpdateInput!): ContactInformation!
         deleteContactInformation(id: ID!): Boolean!
         createPerson(person: PersonCreateInput!): Person!
@@ -1089,22 +1163,22 @@ export default gql`
         "create Engagement"
         createEngagement(engagement: EngagementCreateInput): Engagement!
         lockEngagement(id: ID!): Engagement!
-        unlockEngagement(id: ID!): Boolean!
+        unlockEngagement(id: ID!): Engagement!
         updateEngagement(engagement: EngagementUpdateInput!): Engagement!
         deleteEngagement(id: ID!): Boolean!
         createEngagementType(engagementType: EngagementTypeCreateInput!): EngagementType!
         lockEngagementType(id: ID!): EngagementType!
-        unlockEngagementType(id: ID!): Boolean!
+        unlockEngagementType(id: ID!): EngagementType!
         updateEngagementType(engagementType: EngagementTypeUpdateInput!): EngagementType!
         deleteEngagementType(id: ID!): Boolean!
         createProvider(provider: ProviderCreateInput!): Provider!
         lockProvider(id: ID!): Provider!
-        unlockProvider(id: ID!): Boolean!
+        unlockProvider(id: ID!): Provider!
         updateProvider(provider: ProviderUpdateInput!): Provider!
         deleteProvider(id: ID!): Boolean!
         createOrganisation(organisation: OrganisationCreateInput!): Organisation!
         lockOrganisation(id: ID!): Organisation!
-        unlockOrganisation(id: ID!): Boolean!
+        unlockOrganisation(id: ID!): Organisation!
         updateOrganisation(organisation: OrganisationUpdateInput!): Organisation!
         deleteOrganisation(id: ID!): Boolean!
     }