style: fix linting issues met ESLint

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

@@ -4,9 +4,7 @@ import { LearningObject } from './learning-object.entity.js';
 @Entity()
 export class Attachment {
     @ManyToOne({
-        entity: () => {
-            return LearningObject;
-        },
+        entity: () => LearningObject,
         primary: true,
     })
     learningObject!: LearningObject;

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

@@ -18,9 +18,7 @@ export class LearningObject {
     hruid!: string;
 
     @Enum({
-        items: () => {
-            return Language;
-        },
+        items: () => Language,
         primary: true,
     })
     language!: Language;
@@ -29,9 +27,7 @@ export class LearningObject {
     version: string = '1';
 
     @ManyToMany({
-        entity: () => {
-            return Teacher;
-        },
+        entity: () => Teacher,
     })
     admins!: Teacher[];
 
@@ -57,9 +53,7 @@ export class LearningObject {
     skosConcepts!: string[];
 
     @Embedded({
-        entity: () => {
-            return EducationalGoal;
-        },
+        entity: () => EducationalGoal,
         array: true,
     })
     educationalGoals: EducationalGoal[] = [];
@@ -77,9 +71,7 @@ export class LearningObject {
     estimatedTime!: number;
 
     @Embedded({
-        entity: () => {
-            return ReturnValue;
-        },
+        entity: () => ReturnValue,
     })
     returnValue!: ReturnValue;
 
@@ -90,9 +82,7 @@ export class LearningObject {
     contentLocation?: string;
 
     @OneToMany({
-        entity: () => {
-            return Attachment;
-        },
+        entity: () => Attachment,
         mappedBy: 'learningObject',
     })
     attachments: Attachment[] = [];

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

@@ -17,17 +17,13 @@ export class LearningPath {
     hruid!: string;
 
     @Enum({
-        items: () => {
-            return Language;
-        },
+        items: () => Language,
         primary: true,
     })
     language!: Language;
 
     @ManyToMany({
-        entity: () => {
-            return Teacher;
-        },
+        entity: () => Teacher,
     })
     admins!: Teacher[];
 
@@ -41,9 +37,7 @@ export class LearningPath {
     image!: string;
 
     @Embedded({
-        entity: () => {
-            return LearningPathNode;
-        },
+        entity: () => LearningPathNode,
         array: true,
     })
     nodes: LearningPathNode[] = [];
@@ -55,9 +49,7 @@ export class LearningPathNode {
     learningObjectHruid!: string;
 
     @Enum({
-        items: () => {
-            return Language;
-        },
+        items: () => Language,
     })
     language!: Language;
 
@@ -71,9 +63,7 @@ export class LearningPathNode {
     startNode!: boolean;
 
     @Embedded({
-        entity: () => {
-            return LearningPathTransition;
-        },
+        entity: () => LearningPathTransition,
         array: true,
     })
     transitions!: LearningPathTransition[];
@@ -85,9 +75,7 @@ export class LearningPathTransition {
     condition!: string;
 
     @OneToOne({
-        entity: () => {
-            return LearningPathNode;
-        },
+        entity: () => LearningPathNode,
     })
     next!: LearningPathNode;
 }