[feat] 메소드 PUT 으로 수정

src/main/java/com/example/letscareer/self_intro/controller/SelfIntroController.java

@@ -17,7 +17,7 @@ public class SelfIntroController {
 
     private final SelfIntroService selfIntroService;
 
-    @PostMapping("/schedules/{scheduleId}/stages/{stageId}/self-intro")
+    @PutMapping("/schedules/{scheduleId}/stages/{stageId}/self-intro")
     public ApiResponse saveSelfIntro(
             @RequestHeader("userId") Long userId,
             @PathVariable Long scheduleId,

src/main/java/com/example/letscareer/self_intro/repository/SelfIntroRepository.java

@@ -1,9 +1,11 @@
 package com.example.letscareer.self_intro.repository;
 
 import com.example.letscareer.self_intro.domain.SelfIntro;
+import com.example.letscareer.stage.domain.Stage;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface SelfIntroRepository extends JpaRepository<SelfIntro, Long> {
+    void deleteByStage(Stage stage);
 }

src/main/java/com/example/letscareer/self_intro/service/SelfIntroService.java

@@ -15,7 +15,6 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
-
 import static com.example.letscareer.common.exception.enums.ErrorCode.*;
 
 @Service
@@ -37,7 +36,11 @@ public void saveSelfIntro(Long userId, Long scheduleId, Long stageId, SaveSelfIn
         User user = userRepository.findById(userId)
                 .orElseThrow(() -> new NotFoundException(USER_NOT_FOUND_EXCEPTION));
 
-        for(SelfIntroDTO selfIntroDTO : request.selfIntros()) {
+        // 현재 stage에 있는 모든 SelfIntro를 삭제한다.
+        selfIntroRepository.deleteByStage(stage);
+
+        // 새로 들어온 자기소개서 항목을 저장한다.
+        for (SelfIntroDTO selfIntroDTO : request.selfIntros()) {
             SelfIntro selfIntro = SelfIntro.builder()
                     .title(selfIntroDTO.title())
                     .sequence(selfIntroDTO.sequence())