fix(backend): Foute entity-structuur van leerpaden verbeterd.

Ook testen geschreven voor LearningPathRepository en LearningObjectRepository.

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

@@ -45,7 +45,7 @@ export class LearningObject {
     keywords: string[] = [];
 
     @Property({ type: 'array', nullable: true })
-    targetAges?: number[];
+    targetAges?: number[] = [];
 
     @Property({ type: 'bool' })
     teacherExclusive: boolean = false;

backend/src/entities/content/learning-path-node.entity.ts

@@ -0,0 +1,37 @@
+import {Entity, Enum, ManyToOne, OneToMany, PrimaryKey, Property} from "@mikro-orm/core";
+import {Language} from "./language";
+import {LearningPath} from "./learning-path.entity";
+import {LearningPathTransition} from "./learning-path-transition.entity";
+
+@Entity()
+export class LearningPathNode {
+    @ManyToOne({ entity: () => LearningPath, primary: true })
+    learningPath!: LearningPath;
+
+    @PrimaryKey({ type: "numeric", autoincrement: true })
+    nodeNumber!: number;
+
+    @Property({ type: 'string' })
+    learningObjectHruid!: string;
+
+    @Enum({ items: () => Language })
+    language!: Language;
+
+    @Property({ type: 'number' })
+    version!: number;
+
+    @Property({ type: 'text', nullable: true })
+    instruction?: string;
+
+    @Property({ type: 'bool' })
+    startNode!: boolean;
+
+    @OneToMany({ entity: () => LearningPathTransition, mappedBy: "node" })
+    transitions: LearningPathTransition[] = [];
+
+    @Property({ length: 3 })
+    createdAt: Date = new Date();
+
+    @Property({ length: 3, onUpdate: () => new Date() })
+    updatedAt: Date = new Date();
+}

backend/src/entities/content/learning-path-transition.entity.ts

@@ -0,0 +1,17 @@
+import {Entity, ManyToOne, PrimaryKey, Property} from "@mikro-orm/core";
+import {LearningPathNode} from "./learning-path-node.entity";
+
+@Entity()
+export class LearningPathTransition {
+    @ManyToOne({entity: () => LearningPathNode })
+    node!: LearningPathNode;
+
+    @PrimaryKey({ type: 'numeric' })
+    transitionNumber!: number;
+
+    @Property({ type: 'string' })
+    condition!: string;
+
+    @ManyToOne({ entity: () => LearningPathNode })
+    next!: LearningPathNode;
+}

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

@@ -1,16 +1,14 @@
 import {
-    Embeddable,
-    Embedded,
     Entity,
     Enum,
-    ManyToMany,
-    OneToOne,
+    ManyToMany, OneToMany,
     PrimaryKey,
     Property,
 } from '@mikro-orm/core';
 import { Language } from './language.js';
 import { Teacher } from '../users/teacher.entity.js';
 import {LearningPathRepository} from "../../data/content/learning-path-repository";
+import {LearningPathNode} from "./learning-path-node.entity";
 
 @Entity({repository: () => LearningPathRepository})
 export class LearningPath {
@@ -29,45 +27,9 @@ export class LearningPath {
     @Property({ type: 'text' })
     description!: string;
 
-    @Property({ type: 'blob' })
-    image!: string;
+    @Property({ type: 'blob', nullable: true })
+    image: Buffer | null = null;
 
-    @Embedded({ entity: () => LearningPathNode, array: true })
+    @OneToMany({ entity: () => LearningPathNode, mappedBy: "learningPath" })
     nodes: LearningPathNode[] = [];
 }
-
-@Embeddable()
-export class LearningPathNode {
-    @Property({ type: 'string' })
-    learningObjectHruid!: string;
-
-    @Enum({ items: () => Language })
-    language!: Language;
-
-    @Property({ type: 'number' })
-    version!: number;
-
-    @Property({ type: 'longtext' })
-    instruction!: string;
-
-    @Property({ type: 'bool' })
-    startNode!: boolean;
-
-    @Embedded({ entity: () => LearningPathTransition, array: true })
-    transitions!: LearningPathTransition[];
-
-    @Property({ length: 3 })
-    createdAt: Date = new Date();
-
-    @Property({ length: 3, onUpdate: () => new Date() })
-    updatedAt: Date = new Date();
-}
-
-@Embeddable()
-export class LearningPathTransition {
-    @Property({ type: 'string' })
-    condition!: string;
-
-    @OneToOne({ entity: () => LearningPathNode })
-    next!: LearningPathNode;
-}