[Error] object references an unsaved transient instance

Test - 앞서 생성한 회원 데이터를 통해 Board 객체 생성하기

• 에러 발생

org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing : com.example.board.entity.Board.writer -> com.example.board.entity.Member; nested exception is java.lang.IllegalStateException: org.hibernate.TransientPropertyValueException: object references an unsaved transient instance - save the transient instance before flushing : com.example.board.entity.Board.writer -> com.example.board.entity.Member

• 원인 : 설정 파일(yml)의 jpa.hibernate.ddl-auto가 create로 설정되어 발생한 문제

• 해결 방법
  1. create -> update 변경
  
  2. Member 생성
  
  3. Board 생성