[refactor]: fetch join 함수 repository로 이동

src/main/java/com/dnd/gongmuin/answer/repository/AnswerRepository.java

@@ -1,6 +1,7 @@
 package com.dnd.gongmuin.answer.repository;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.data.domain.Slice;
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -21,4 +22,8 @@ public interface AnswerRepository extends JpaRepository<Answer, Long> {
 	@Modifying(flushAutomatically = true, clearAutomatically = true)
 	@Query("UPDATE Answer a SET a.member = :member WHERE a.member.id = :memberId")
 	void updateAnswersMember(Long memberId, Member member);
+
+	@Query("select a from Answer a "
+		+ "join fetch a.member where a.id = :answerId")
+	Optional<Answer> findByIdWithMember(Long answerId);
 }

src/main/java/com/dnd/gongmuin/answer/service/AnswerService.java

@@ -13,7 +13,6 @@
 import com.dnd.gongmuin.answer.dto.RegisterAnswerRequest;
 import com.dnd.gongmuin.answer.exception.AnswerErrorCode;
 import com.dnd.gongmuin.answer.repository.AnswerRepository;
-import com.dnd.gongmuin.answer.repository.AnswerSimpleQueryRepository;
 import com.dnd.gongmuin.common.dto.PageMapper;
 import com.dnd.gongmuin.common.dto.PageResponse;
 import com.dnd.gongmuin.common.exception.runtime.NotFoundException;
@@ -24,7 +23,6 @@
 import com.dnd.gongmuin.question_post.domain.QuestionPost;
 import com.dnd.gongmuin.question_post.exception.QuestionPostErrorCode;
 import com.dnd.gongmuin.question_post.repository.QuestionPostRepository;
-import com.dnd.gongmuin.question_post.repository.QuestionPostSimpleQueryRepository;
 
 import lombok.RequiredArgsConstructor;
 
@@ -36,8 +34,6 @@ public class AnswerService {
 	private final AnswerRepository answerRepository;
 	private final CreditHistoryService creditHistoryService;
 	private final ApplicationEventPublisher eventPublisher;
-	private final QuestionPostSimpleQueryRepository questionPostSimpleQueryRepository;
-	private final AnswerSimpleQueryRepository answerSimpleQueryRepository;
 
 	private static void validateIfQuestioner(Member member, QuestionPost questionPost) {
 		if (!questionPost.isQuestioner(member.getId())) {
@@ -77,8 +73,8 @@ public AnswerDetailResponse chooseAnswer(
 		Long answerId,
 		Member member
 	) {
-		Answer answer = getAnswerById(answerId);
-		QuestionPost questionPost = findQuestionPostById(answer.getQuestionPostId());
+		Answer answer = getAnswerWithMember(answerId);
+		QuestionPost questionPost = getQuestionPostWithMember(answer.getQuestionPostId());
 		validateIfQuestioner(member, questionPost);
 		chooseAnswer(questionPost, answer);
 
@@ -103,8 +99,8 @@ private void validateIfQuestionPostExists(Long questionPostId) {
 		}
 	}
 
-	private Answer getAnswerById(Long answerId) {
-		return answerSimpleQueryRepository.findAnswerById(answerId)
+	private Answer getAnswerWithMember(Long answerId) {
+		return answerRepository.findByIdWithMember(answerId)
 			.orElseThrow(() -> new NotFoundException(AnswerErrorCode.NOT_FOUND_ANSWER));
 	}
 
@@ -113,8 +109,8 @@ private QuestionPost getQuestionPostById(Long questionPostId) {
 			.orElseThrow(() -> new NotFoundException(QuestionPostErrorCode.NOT_FOUND_QUESTION_POST));
 	}
 
-	private QuestionPost findQuestionPostById(Long questionPostId) {
-		return questionPostSimpleQueryRepository.findQuestionPostById(questionPostId)
+	private QuestionPost getQuestionPostWithMember(Long questionPostId) {
+		return questionPostRepository.findByIdWithMember(questionPostId)
 			.orElseThrow(() -> new NotFoundException(QuestionPostErrorCode.NOT_FOUND_QUESTION_POST));
 	}
 }

src/main/java/com/dnd/gongmuin/chat_inquiry/dto/ChatInquiryResponse.java

@@ -1,10 +1,8 @@
 package com.dnd.gongmuin.chat_inquiry.dto;
 
-import com.dnd.gongmuin.chat_inquiry.domain.InquiryStatus;
-import com.dnd.gongmuin.member.domain.JobGroup;
-import com.dnd.gongmuin.member.dto.response.MemberInfo;
 import com.dnd.gongmuin.chat_inquiry.domain.ChatInquiry;
 import com.dnd.gongmuin.member.domain.Member;
+import com.dnd.gongmuin.member.dto.response.MemberInfo;
 import com.querydsl.core.annotations.QueryProjection;
 
 public record ChatInquiryResponse(

src/main/java/com/dnd/gongmuin/question_post/repository/QuestionPostRepository.java

@@ -1,6 +1,7 @@
 package com.dnd.gongmuin.question_post.repository;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Modifying;
@@ -16,7 +17,11 @@ public interface QuestionPostRepository extends JpaRepository<QuestionPost, Long
 
 	List<QuestionPost> findAllByMember(Member member);
 
+	@Query("select q from QuestionPost q "
+		+ "join fetch q.member where q.id = :questionPostId")
+	Optional<QuestionPost> findByIdWithMember(Long questionPostId);
+
 	@Modifying(flushAutomatically = true, clearAutomatically = true)
 	@Query("UPDATE QuestionPost q SET q.member = :member WHERE q.member.id = :memberId")
-	public void updateQuestionPostsMember(Long memberId, Member member);
+	void updateQuestionPostsMember(Long memberId, Member member);
 }

src/test/java/com/dnd/gongmuin/answer/controller/AnswerControllerTest.java

@@ -125,7 +125,6 @@ void chooseAnswer() throws Exception {
 			= questionPostRepository.save(QuestionPostFixture.questionPost(loginMember));
 		Member answerer = memberRepository.save(MemberFixture.member2());
 		Answer answer = answerRepository.save(AnswerFixture.answer(questionPost.getId(), answerer));
-		long startTime = System.currentTimeMillis();
 
 		mockMvc.perform(post("/api/question-posts/answers/{answerId}", answer.getId())
 				.cookie(accessToken)
@@ -138,7 +137,5 @@ void chooseAnswer() throws Exception {
 			.andExpect(jsonPath("$.memberInfo.nickname").value(answerer.getNickname()))
 			.andExpect(jsonPath("$.memberInfo.memberJobGroup").value(answerer.getJobGroup().getLabel())
 			);
-		long endTime = System.currentTimeMillis();
-		System.out.println("Execution time: " + (endTime - startTime) + " ms");
 	}
 }