Updated the member controller to have apis of post for memberclasses to add relations here, the json managed references opens opportunities to do so without cyclic dependency so add them to classes and memberclass as well for future use, not adding delete api as cascading is present for both ends ensuring automatic deletions.

Author: Abdul-Khaliq-Dadabhoy

src/main/java/com/example/easynotes/controller/MemberController.java

@@ -55,6 +55,31 @@ public HashMap getClassesById(@PathVariable Long memberId, @PathVariable Long cl
         return null;
     }
 
+    @PostMapping("/memclasses")
+    public MemberClass assignClassToMember(@RequestBody Map<String, Long> body) {
+        // Log for debugging to check if body is received correctly
+        System.out.println("Request body: " + body);
+
+        Long memberId = body.get("memberId");
+        Long classId = body.get("classId");
+
+        if (memberId == null || classId == null) {
+            throw new RuntimeException("memberId and classId are required");
+        }
+
+        Member member = memberRepository.findById(memberId)
+                .orElseThrow(() -> new RuntimeException("Member not found"));
+        Classes classes = classesRepository.findById(classId)
+                .orElseThrow(() -> new RuntimeException("Class not found"));
+
+        MemberClass memberClass = new MemberClass();
+        memberClass.setMember(member);
+        memberClass.setClasses(classes);
+
+        return memberClassRepository.save(memberClass);
+    }
+
+
     @GetMapping("/{memberId}")
     public Optional<Member> getMemberById(@PathVariable Long memberId) {
         return memberRepository.findById(memberId);
@@ -96,4 +121,5 @@ public List<Feedback> getMemberFeedback(@PathVariable Long memberId) {
 // POST: Assign a member to a class
 
 
+
 }

src/main/java/com/example/easynotes/model/Classes.java

@@ -7,6 +7,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 
 @Entity
 public class Classes {
@@ -31,6 +32,7 @@ public class Classes {
 
     @OneToMany(mappedBy = "classes", cascade = CascadeType.ALL, orphanRemoval = true)
     @JsonIgnore
+    @JsonManagedReference
     private List<MemberClass> memberClass = new ArrayList<>();
 
 

src/main/java/com/example/easynotes/model/MemberClass.java

@@ -1,6 +1,7 @@
 package com.example.easynotes.model;
 
 import com.fasterxml.jackson.annotation.JsonBackReference;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 
 import javax.persistence.*;
 
@@ -18,6 +19,7 @@ public class MemberClass {
 
     @ManyToOne
     @JoinColumn(name = "class_id")
+    @JsonBackReference
     private Classes classes;