spring

[Spring Data Jpa] (JUNIT, DDL) 외래키 제약조건에 NOT NULL을 추가해보자.

책 DB ( Book Entity ) package com.example.jpa.domain; @Entity @NoArgsConstructor @Data @ToString(callSuper = true) @EqualsAndHashCode(callSuper = true) public class Book extends BaseEntity { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String name; private String category; private Long authorId; private Long publisherId; } PK로 id를 들고있고 문자열 타입으로 name, category, ..