Fix eager loading

application/module-exercise/src/main/java/org/fuseri/moduleexercise/exercise/Exercise.java

@@ -29,7 +29,7 @@ public class Exercise extends DomainObject {
 
     private int difficulty;
 
-    @Column(name = "lecture_id")
+    @Column(name = "course_id")
     private long courseId;
 
     @OneToMany(mappedBy="exercise", cascade = CascadeType.ALL)

application/module-exercise/src/main/java/org/fuseri/moduleexercise/question/Question.java

@@ -2,6 +2,7 @@ package org.fuseri.moduleexercise.question;
 
 import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
 import jakarta.persistence.JoinColumn;
 import jakarta.persistence.ManyToOne;
 import jakarta.persistence.OneToMany;
@@ -35,7 +36,7 @@ public class Question extends DomainObject {
     @OneToMany(mappedBy = "question", cascade = CascadeType.ALL, orphanRemoval = true)
     private Set<Answer> answers = new HashSet<>();
 
-    @ManyToOne
+    @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "exercise_id", nullable = false)
     private Exercise exercise;
 
@@ -46,5 +47,8 @@ public class Question extends DomainObject {
      */
     public void addAnswers(Set<Answer> answersToAdd) {
         answers.addAll(answersToAdd);
+        for (var answer : answersToAdd) {
+            answer.setQuestion(this);
+        }
     }
 }

application/module-exercise/src/main/java/org/fuseri/moduleexercise/question/QuestionController.java

@@ -95,7 +95,7 @@ public class QuestionController {
             @ApiResponse(responseCode = "404", description = "Exercise with the specified ID was not found.")
     })
     @PostMapping
-    public ResponseEntity<QuestionDto> addQuestion(@Valid @RequestBody QuestionCreateDto dto) {
+    public ResponseEntity<QuestionDto> createQuestion(@Valid @RequestBody QuestionCreateDto dto) {
         QuestionDto createdQuestionDto = questionFacade.create(dto);
         return ResponseEntity.status(HttpStatus.CREATED).body(createdQuestionDto);
     }

application/module-exercise/src/main/java/org/fuseri/moduleexercise/question/QuestionService.java

@@ -83,6 +83,19 @@ public class QuestionService extends DomainService<Question> {
             throw new EntityNotFoundException(
                     "Question with id: " + id + " was not found.");
         }
+    }
 
+    /**
+     * Create a question with answers
+     *
+     * @param question the question to create
+     * @return the created question
+     */
+    @Override
+    public Question create(Question question) {
+        for (var answer: question.getAnswers()) {
+            answer.setQuestion(question);
+        }
+        return getRepository().save(question);
     }
 }