fix: 카카오토큰 영속화

src/main/java/com/knu/daeguhackathon/kakaotoken/repository/KakaoTokenRepository.java

@@ -1,6 +1,7 @@
 package com.knu.daeguhackathon.kakaotoken.repository;
 
 import com.knu.daeguhackathon.kakaotoken.KakaoToken;
+import com.knu.daeguhackathon.member.Member;
 import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
@@ -11,4 +12,6 @@ public interface KakaoTokenRepository extends JpaRepository<KakaoToken, Long> {
     Optional<KakaoToken> findByAccessToken(String accessToken);
 
     Optional<KakaoToken> findByMemberId(Long memberId);
+
+    KakaoToken findByMember(Member member);
 }

src/main/java/com/knu/daeguhackathon/kakaotoken/service/KakaoTokenService.java

@@ -20,22 +20,23 @@ public class KakaoTokenService {
     private final MemberRepository memberRepository;
 
     @Transactional
-    public KakaoToken saveKakaoToken(String email, KakaoTokenResponse tokenInfo) {
+    public void saveKakaoToken(String email, KakaoTokenResponse tokenInfo) {
 
         Member member = memberRepository.findByEmail(email).orElseThrow(
             () -> new RuntimeException("이메일에 해당하는 Member가 없습니다")
         );
 
         KakaoToken kakaoToken = KakaoToken.builder()
-            .member(member)
             .accessToken(tokenInfo.accessToken())
             .refreshToken(tokenInfo.refreshToken())
             .expires_in(tokenInfo.expiresIn())
             .issuedAt(LocalDateTime.now())
             .updated_at(LocalDateTime.now())
             .build();
 
-        return kakaoTokenRepository.save(kakaoToken);
+        KakaoToken savedToken = kakaoTokenRepository.save(kakaoToken);
+
+        member.setKakaoToken(savedToken);
     }
 
     @Transactional

src/main/java/com/knu/daeguhackathon/member/Member.java

@@ -41,7 +41,7 @@ public class Member extends BaseTimeEntity {
     private LocalDateTime createdTime;
     private int speed;
     private String nickName;
-    @OneToOne
+    @OneToOne(cascade = CascadeType.PERSIST)
     private KakaoToken kakaoToken;
     @OneToMany(mappedBy = "member", cascade = CascadeType.REMOVE)
     private List<Subject> subjects = new ArrayList<>();