hotfix: 계정 중복 생성 방지

Author: songyi00

tuk-api/src/main/kotlin/nexters/tuk/application/member/MemberService.kt

@@ -13,7 +13,10 @@ class MemberService(
 ) {
     @Transactional
     fun signUp(command: MemberCommand.SignUp): MemberResponse.SignUp {
-        val member = memberRepository.save(Member.signUp(command))
+        val member = memberRepository.findBySocialTypeAndEmail(
+            socialType = command.socialType,
+            email = command.email
+        ) ?: memberRepository.save(Member.signUp(command))
 
         return MemberResponse.SignUp(
             memberId = member.id,

tuk-api/src/main/kotlin/nexters/tuk/domain/member/Member.kt

@@ -7,10 +7,12 @@ import jakarta.persistence.Table
 import nexters.tuk.application.member.SocialType
 import nexters.tuk.application.member.dto.request.MemberCommand
 import nexters.tuk.domain.BaseEntity
+import org.hibernate.annotations.SQLRestriction
 
 /**
  * FIXME: member 임시 테이블
  */
+@SQLRestriction("deleted_at is NULL")
 @Entity
 @Table(name = "member")
 class Member private constructor(

tuk-api/src/main/kotlin/nexters/tuk/domain/member/MemberRepository.kt

@@ -1,7 +1,9 @@
 package nexters.tuk.domain.member
 
+import nexters.tuk.application.member.SocialType
 import org.springframework.data.jpa.repository.JpaRepository
 
 interface MemberRepository : JpaRepository<Member, Long> {
     fun findByEmail(email: String): Member?
+    fun findBySocialTypeAndEmail(socialType: SocialType, email: String): Member?
 }