Fix null checking in tag selection query

Signed-off-by: trivernis <trivernis@protonmail.com>

mediarepo-daemon/mediarepo-model/src/file.rs

@@ -90,8 +90,9 @@ impl File {
         }
         let results: Vec<(hash::Model, Option<file::Model>)> = hash::Entity::find()
             .find_also_related(file::Entity)
-            .join(JoinType::Join, hash_tag::Relation::Hash.def())
+            .join(JoinType::Join, hash_tag::Relation::Hash.def().rev())
             .filter(condition)
+            .group_by(file::Column::Id)
             .all(&db)
             .await?;
         let files: Vec<Self> = results

mediarepo-daemon/mediarepo-model/src/tag.rs

@@ -3,6 +3,7 @@ use mediarepo_core::error::RepoResult;
 use mediarepo_database::entities::namespace;
 use mediarepo_database::entities::tag;
 use sea_orm::prelude::*;
+use sea_orm::sea_query::Expr;
 use sea_orm::{Condition, DatabaseConnection, Set};
 
 #[derive(Clone)]
@@ -74,7 +75,7 @@ impl Tag {
             all_condition = if let Some(namespace) = namespace {
                 all_condition.add(namespace::Column::Name.eq(namespace))
             } else {
-                all_condition.add(tag::Column::NamespaceId.eq(Option::<i64>::None))
+                all_condition.add(Expr::tbl(tag::Entity, tag::Column::NamespaceId).is_null())
             };
             or_condition = or_condition.add(all_condition);
         }