[BE] 참여자 이름 변경시 지출 상세 이름 변경 안되는 버그 수정

server/src/main/java/server/haengdong/application/EventService.java

@@ -16,6 +16,7 @@
 import server.haengdong.application.response.EventDetailAppResponse;
 import server.haengdong.application.response.MembersAppResponse;
 import server.haengdong.domain.action.BillAction;
+import server.haengdong.domain.action.BillActionDetailRepository;
 import server.haengdong.domain.action.BillActionRepository;
 import server.haengdong.domain.action.MemberAction;
 import server.haengdong.domain.action.MemberActionRepository;
@@ -35,6 +36,7 @@ public class EventService {
     private final EventTokenProvider eventTokenProvider;
     private final BillActionRepository billActionRepository;
     private final MemberActionRepository memberActionRepository;
+    private final BillActionDetailRepository billActionDetailRepository;
 
     @Transactional
     public EventAppResponse saveEvent(EventAppRequest request) {
@@ -149,6 +151,8 @@ private void validateAfterMemberNameNotExist(Event event, String afterName) {
     private void updateMemberName(Event event, String beforeName, String afterName) {
         memberActionRepository.findAllByAction_EventAndMemberName(event, beforeName)
                 .forEach(memberAction -> memberAction.updateMemberName(afterName));
+        billActionDetailRepository.findAllByMemberName(beforeName)
+                .forEach(billActionDetail -> billActionDetail.updateMemberName(afterName));
     }
 
     public void validatePassword(EventLoginAppRequest request) throws HaengdongException {

server/src/main/java/server/haengdong/domain/action/BillActionDetail.java

@@ -43,6 +43,10 @@ public void updateIsFixed(boolean isFixed) {
         this.isFixed = isFixed;
     }
 
+    public void updateMemberName(String name) {
+        this.memberName = name;
+    }
+
     public boolean hasMemberName(String memberName) {
         return this.memberName.equals(memberName);
     }

server/src/main/java/server/haengdong/domain/action/BillActionDetailRepository.java

@@ -14,4 +14,6 @@ public interface BillActionDetailRepository extends JpaRepository<BillActionDeta
             where bd.billAction = :billAction
             """)
     List<BillActionDetail> findAllByBillAction(BillAction billAction);
+
+    List<BillActionDetail> findAllByMemberName(String memberName);
 }