KKUMI-118 [FEATURE] #73 postId 없이 좋아요 요청시 예외처리

기존: 500 서버 에러로 내려감
변경후: postId가 null이면 안된다는 메시지 내려감

src/main/java/com/swmarastro/mykkumiserver/like/LikesController.java

@@ -4,6 +4,7 @@
 import com.swmarastro.mykkumiserver.auth.annotation.RequiresLogin;
 import com.swmarastro.mykkumiserver.like.dto.LikesRequest;
 import com.swmarastro.mykkumiserver.user.User;
+import jakarta.validation.Valid;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.PostMapping;
@@ -20,14 +21,14 @@ public class LikesController {
 
     @RequiresLogin
     @PostMapping("/like")
-    public ResponseEntity<Void> like(@Login User user, @RequestBody LikesRequest request) {
+    public ResponseEntity<Void> like(@Login User user, @Valid @RequestBody LikesRequest request) {
         likeService.like(user, request.getPostId());
         return ResponseEntity.ok().build();
     }
 
     @RequiresLogin
     @PostMapping("/unlike")
-    public ResponseEntity<Void> unlike(@Login User user, @RequestBody LikesRequest request) {
+    public ResponseEntity<Void> unlike(@Login User user, @Valid @RequestBody LikesRequest request) {
         likeService.unlike(user, request.getPostId());
         return ResponseEntity.ok().build();
     }

src/main/java/com/swmarastro/mykkumiserver/like/dto/LikesRequest.java

@@ -1,9 +1,11 @@
 package com.swmarastro.mykkumiserver.like.dto;
 
+import jakarta.validation.constraints.NotNull;
 import lombok.Getter;
 
 @Getter
 public class LikesRequest {
 
+    @NotNull
     private Long postId;
 }