fix(backend): Foreign constraint probleem bij het verwijderen van leerpaden opgelost

backend/src/entities/content/attachment.entity.ts

@@ -9,6 +9,7 @@ export class Attachment {
     @ManyToOne({
         entity: () => LearningObject,
         primary: true,
+        deleteRule: 'cascade'
     })
     learningObject!: LearningObject;
 

backend/src/entities/content/learning-object.entity.ts

@@ -1,6 +1,5 @@
 import {
     ArrayType,
-    Cascade,
     Collection,
     Embedded,
     Entity,
@@ -93,8 +92,7 @@ export class LearningObject {
 
     @OneToMany({
         entity: () => Attachment,
-        mappedBy: 'learningObject',
-        cascade: [Cascade.ALL]
+        mappedBy: 'learningObject'
     })
     attachments: Collection<Attachment> = new Collection<Attachment>(this);
 

backend/src/services/learning-objects/learning-object-service.ts

@@ -72,8 +72,6 @@ const learningObjectService = {
             learningObject.hruid = getEnvVar(envVars.UserContentPrefix) + learningObject.hruid;
         }
 
-        await learningObjectRepository.getEntityManager().flush();
-
         // Lookup the admin teachers based on their usernames and add them to the admins of the learning object.
         const teacherRepo = getTeacherRepository();
         const adminTeachers = await Promise.all(
@@ -85,7 +83,13 @@ const learningObjectService = {
             }
         });
 
-        await learningObjectRepository.save(learningObject, {preventOverwrite: true});
+        try {
+            await learningObjectRepository.save(learningObject, {preventOverwrite: true});
+        } catch (e: unknown) {
+            learningObjectRepository.getEntityManager().clear();
+            throw e;
+        }
+
         return learningObject;
     },