refactor: 중간 테이블 엔티티 수정 #56 (#57)

* refactor: 중간 테이블명 TravelMember로 변경

* refactor: 중간 테이블 OneToMany 필드 추가

* refactor: Member OneToMany 제거

* refactor: OneToMany List 초기화

* refactor: 연관관계 편의 메서드 사용

* chore: ddl 전략 임시 변경

* chore: ddl 전략 변경

backend/src/main/java/com/staccato/member/domain/Member.java

@@ -1,14 +1,18 @@
 package com.staccato.member.domain;
 
+import java.util.List;
+
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
 
 import org.hibernate.annotations.SQLDelete;
 
 import com.staccato.config.domain.BaseEntity;
+import com.staccato.travel.domain.TravelMember;
 
 import lombok.AccessLevel;
 import lombok.Builder;

backend/src/main/java/com/staccato/travel/domain/Travel.java

@@ -1,12 +1,15 @@
 package com.staccato.travel.domain;
 
 import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.List;
 
 import jakarta.persistence.Column;
 import jakarta.persistence.Entity;
 import jakarta.persistence.GeneratedValue;
 import jakarta.persistence.GenerationType;
 import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
 
 import org.hibernate.annotations.SQLDelete;
 
@@ -37,6 +40,8 @@ public class Travel extends BaseEntity {
     private LocalDate startAt;
     @Column(nullable = false)
     private LocalDate endAt;
+    @OneToMany(mappedBy = "travel")
+    private List<TravelMember> travelMembers = new ArrayList<>();
 
     @Builder
     public Travel(String thumbnailUrl, @NonNull String title, String description, @NonNull LocalDate startAt, @NonNull LocalDate endAt) {
@@ -53,4 +58,8 @@ private void validateDate(LocalDate startAt, LocalDate endAt) {
             throw new StaccatoException("끝 날짜가 시작 날짜보다 앞설 수 없어요.");
         }
     }
+
+    public void addTravelMember(TravelMember travelMember) {
+        travelMembers.add(travelMember);
+    }
 }

backend/src/main/java/com/staccato/travel/domain/Mate.java → backend/src/main/java/com/staccato/travel/domain/TravelMember.java

@@ -23,7 +23,7 @@
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @SQLDelete(sql = "UPDATE mate SET is_deleted = true WHERE id = ?")
-public class Mate extends BaseEntity {
+public class TravelMember extends BaseEntity {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
@@ -35,8 +35,9 @@ public class Mate extends BaseEntity {
     private Travel travel;
 
     @Builder
-    public Mate(@NonNull Member member, @NonNull Travel travel) {
+    public TravelMember(@NonNull Member member, @NonNull Travel travel) {
         this.member = member;
         this.travel = travel;
+        travel.addTravelMember(this);
     }
 }

backend/src/main/java/com/staccato/travel/repository/TravelMemberRepostiory.java

@@ -0,0 +1,8 @@
+package com.staccato.travel.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.staccato.travel.domain.TravelMember;
+
+public interface TravelMemberRepostiory extends JpaRepository<TravelMember, Long> {
+}

backend/src/main/java/com/staccato/travel/service/TravelService.java

@@ -5,9 +5,9 @@
 
 import com.staccato.member.domain.Member;
 import com.staccato.member.repository.MemberRepository;
-import com.staccato.travel.domain.Mate;
 import com.staccato.travel.domain.Travel;
-import com.staccato.travel.repository.MateRepository;
+import com.staccato.travel.domain.TravelMember;
+import com.staccato.travel.repository.TravelMemberRepostiory;
 import com.staccato.travel.repository.TravelRepository;
 import com.staccato.travel.service.dto.request.TravelRequest;
 import com.staccato.travel.service.dto.response.TravelResponse;
@@ -19,24 +19,23 @@
 @Transactional(readOnly = true)
 public class TravelService {
     private final TravelRepository travelRepository;
-    private final MateRepository mateRepository;
+    private final TravelMemberRepostiory travelMemberRepostiory;
     private final MemberRepository memberRepository;
 
     @Transactional
     public TravelResponse createTravel(TravelRequest travelRequest, Long memberId) {
-        Travel travel = travelRequest.toTravel();
-        Travel savedTravel = travelRepository.save(travel);
-        saveMate(memberId, savedTravel);
-        return new TravelResponse(savedTravel);
+        Travel travel = travelRepository.save(travelRequest.toTravel());
+        saveTravelMember(memberId, travel);
+        return new TravelResponse(travel);
     }
 
-    private void saveMate(Long memberId, Travel travel) {
+    private TravelMember saveTravelMember(Long memberId, Travel travel) {
         Member member = getMemberById(memberId);
-        Mate mate = Mate.builder()
+        TravelMember mate = TravelMember.builder()
                 .travel(travel)
                 .member(member)
                 .build();
-        mateRepository.save(mate);
+        return travelMemberRepostiory.save(mate);
     }
 
     private Member getMemberById(long memberId) {

backend/src/main/resources/application.yml

@@ -25,7 +25,7 @@ spring:
       hibernate:
         format_sql: true
     hibernate:
-      ddl-auto: none
+      ddl-auto: update
     database-platform: org.hibernate.dialect.MySQL8Dialect
     defer-datasource-initialization: true
 

backend/src/test/java/com/staccato/travel/service/TravelServiceTest.java

@@ -12,8 +12,8 @@
 import com.staccato.ServiceSliceTest;
 import com.staccato.member.domain.Member;
 import com.staccato.member.repository.MemberRepository;
-import com.staccato.travel.domain.Mate;
-import com.staccato.travel.repository.MateRepository;
+import com.staccato.travel.domain.TravelMember;
+import com.staccato.travel.repository.TravelMemberRepostiory;
 import com.staccato.travel.service.dto.request.TravelRequest;
 import com.staccato.travel.service.dto.response.TravelResponse;
 
@@ -23,7 +23,7 @@ class TravelServiceTest extends ServiceSliceTest {
     @Autowired
     private MemberRepository memberRepository;
     @Autowired
-    private MateRepository mateRepository;
+    private TravelMemberRepostiory travelMemberRepostiory;
 
     @DisplayName("여행 상세 정보를 기반으로, 여행 상세를 생성하고 작성자를 저장한다.")
     @Test
@@ -40,12 +40,12 @@ void createTravel() {
 
         // when
         TravelResponse travel = travelService.createTravel(travelRequest, member.getId());
-        Mate mate = mateRepository.findAll().get(0);
+        TravelMember travelMember = travelMemberRepostiory.findAll().get(0);
 
         // then
         assertAll(
-                () -> Assertions.assertThat(mate.getMember().getId()).isEqualTo(member.getId()),
-                () -> Assertions.assertThat(mate.getTravel().getId()).isEqualTo(travel.travelId())
+                () -> Assertions.assertThat(travelMember.getMember().getId()).isEqualTo(member.getId()),
+                () -> Assertions.assertThat(travelMember.getTravel().getId()).isEqualTo(travel.travelId())
         );
     }
 }