#6 fix: 3번째 답변 등록 시 쥬시글로 전환

src/main/java/com/ewhatever/qna/answer/repository/AnswerRepository.java

@@ -15,4 +15,5 @@ public interface AnswerRepository extends JpaRepository<Answer, Long> {
     Long countByAnswerer_UserIdxAndStatusEquals(Long userIdx, String status);
     Page<Answer> findByAnswerer_UserIdxAndPost_IsJuicyAndStatusEquals(Long userIdx, Boolean isJuicy, String status, Pageable pageable);
     Long countByPost_PostIdxAndStatusEquals(Long postIdx, String status);
+    int countByPostAndIsJuicyFalse(Post post);
 }

src/main/java/com/ewhatever/qna/answer/service/AnswerService.java

@@ -4,35 +4,45 @@
 import com.ewhatever.qna.answer.entity.Answer;
 import com.ewhatever.qna.answer.repository.AnswerRepository;
 import com.ewhatever.qna.common.Base.BaseException;
-import com.ewhatever.qna.common.enums.Role;
 import com.ewhatever.qna.post.entity.Post;
 import com.ewhatever.qna.post.repository.PostRepository;
 import com.ewhatever.qna.user.entity.User;
 import com.ewhatever.qna.user.repository.UserRepository;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
 
 import static com.ewhatever.qna.common.Base.BaseResponseStatus.*;
 import static com.ewhatever.qna.common.Constant.Status.ACTIVE;
+import static com.ewhatever.qna.common.enums.Role.SINY;
 
 @Service
 public class AnswerService {
     UserRepository userRepository;
     PostRepository postRepository;
     AnswerRepository answerRepository;
-    /**
-     * 답변 등록
-     */
+
+    @Transactional(rollbackFor = Exception.class)
     public void addAnswer(Long userIdx, PostAnswerReq postAnswerReq) throws BaseException {
         try {
             User user = userRepository.findByUserIdxAndStatusEquals(userIdx, ACTIVE).orElseThrow(() -> new BaseException(INVALID_USER));
             Post post = postRepository.findById(postAnswerReq.getPostIdx()).orElseThrow(() -> new BaseException(INVALID_POST_IDX));
-            if (user.getRole().equals(Role.SINY)) {
-                Answer answer = Answer.builder()
-                        .content(postAnswerReq.getAnswer())
-                        .answerer(user)
-                        .post(post)
-                        .build();
-                answerRepository.save(answer);
+            int currentAnswerCount = answerRepository.countByPostAndIsJuicyFalse(post);
+            if (user.getRole().equals(SINY)) {
+                if (currentAnswerCount < 3) { // 크론잡 주기 사이에 답변이 등록되어 isJuicy 컬럼값에 아직 반영이 안된 경우를 위해 예외처리
+                    Answer answer = Answer.builder()
+                            .content(postAnswerReq.getAnswer())
+                            .answerer(user)
+                            .post(post)
+                            .build();
+                    answerRepository.save(answer);
+
+                    currentAnswerCount = answerRepository.countByPostAndIsJuicyFalse(post); //currentAnswerCount 최신화
+                    // 3번째 답변이면 쥬시글로 전환
+                    if (currentAnswerCount == 3) {
+                        post.setIsJuicy(true);
+                    }
+                    postRepository.save(post);
+                } else throw new BaseException(ALREADY_JUICY_POST);
             } else throw new BaseException(NO_SENIOR_ROLE);
         } catch (BaseException e) {
             throw e;

src/main/java/com/ewhatever/qna/common/Base/BaseResponseStatus.java

@@ -13,6 +13,7 @@ public enum BaseResponseStatus {
      * 2000: Request 오류
      */
     // answer(2000-2099)
+    ALREADY_JUICY_POST(false, 2000, "이미 쥬시글로 등록된 post입니다,"),
 
     // comment(2100-2199)
     INVALID_COMMENT_IDX(false, 2100, "잘못된 commentIdx입니다."),

src/main/java/com/ewhatever/qna/post/entity/Post.java

@@ -60,8 +60,8 @@ public class Post extends BaseEntity {
     public void setScrapCount(Long scrapCount) {
         this.scrapCount = scrapCount;
     }
-
     public void setCommentCount(Long commentCount) { this.commentCount = commentCount; }
+    public void setIsJuicy(Boolean isJuicy) { this.isJuicy = isJuicy; }
 }