fix: functies in assignment entity zijn nu bereikbaar

backend/src/entities/assignments/assignment.entity.ts

@@ -9,8 +9,13 @@ import {
 import { Class } from '../classes/class.entity.js';
 import { Group } from './group.entity.js';
 import { Language } from '../content/language.js';
+import { AssignmentRepository } from '../../data/assignments/assignment-repository.js';
 
-@Entity()
+@Entity({
+    repository: () => {
+        return AssignmentRepository;
+    },
+})
 export class Assignment {
     @ManyToOne({
         entity: () => {