春天CrudRepository无法股价生成的ID复合主键

Question

我试图使用春天CRUDRepository使用JPA的数据库模型中插入新的对象到数据库（User.java，UserInfo.java）。数据库模型与复合主键相关（UserPK.java），其中一个是自动生成的（字段名为id），第二个（字段名为类型）在开始时设置。

而且我得到的错误，当我创建新的对象，使用CRUDRepository（UserRepository.java） - 不能插入新的对象为第二个模型（UserInfo.java），因为ID为空（第一种模式被正确添加）。我认为问题在于共享/映射数据库模型中的复合主键。 我尝试了与EntityManager相同的模型，它不是错误 - 所有被添加。接下来我用@PrimaryKeyJoinColumns注释，但是与上面的结果相同（但我不确定我是否正确使用它） - CRUDRepository失败，并且EntityManager成功。

任何人都可以帮我找到解决办法吗？如果有人想运行代码，我还会在GitHub上添加源代码。

日志如下：

登录以下CRUDRepository

Hibernate: select user0_.id as id1_0_1_, user0_.type as type2_0_1_, user0_.email as email3_0_1_, user0_.login as login4_0_1_, userinfo1_.id as id3_1_0_, userinfo1_.type as type4_1_0_, userinfo1_.name as name1_1_0_, userinfo1_.surname as surname2_1_0_ from user user0_ left outer join user_info userinfo1_ on user0_.id=userinfo1_.id and user0_.type=userinfo1_.type where user0_.id=? and user0_.type=? 
Hibernate: call next value for seq_id 
Hibernate: select userinfo0_.id as id3_1_0_, userinfo0_.type as type4_1_0_, userinfo0_.name as name1_1_0_, userinfo0_.surname as surname2_1_0_ from user_info userinfo0_ where userinfo0_.id=? and userinfo0_.type=? 
Hibernate: insert into user (email, login, id, type) values (?, ?, ?, ?) 
Hibernate: insert into user_info (name, surname, id, type) values (?, ?, ?, ?) 
WARN 17653 --- [nio-8080-exec-3] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 23502, SQLState: 23502 
ERROR 17653 --- [nio-8080-exec-3] o.h.engine.jdbc.spi.SqlExceptionHelper : NULL not allowed for column "ID"; SQL statement: 
insert into user_info (name, surname, id, type) values (?, ?, ?, ?) [23502-196] 
... 

登录的EntityManager

Hibernate: call next value for seq_id 
Hibernate: insert into user (email, login, id, type) values (?, ?, ?, ?) 
Hibernate: insert into user_info (name, surname, id, type) values (?, ?, ?, ?) 

代码：

主要模型：User.java

import com.fasterxml.jackson.annotation.JsonManagedReference; 
import javax.persistence.*; 
import javax.validation.constraints.NotNull; 
import java.io.Serializable; 

@Entity 
@Table(name = "USER") 
@IdClass(UserPK.class) 
public class User implements Serializable { 

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "user") 
    @JsonManagedReference 
    private UserInfo info; 

    @Id 
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_ID") 
    @SequenceGenerator(name = "SEQ_ID", sequenceName = "SEQ_ID", allocationSize = 1) 
    @NotNull 
    @Column(name = "ID") 
    private Long id; 
    @Id 
    @NotNull 
    @Column(name = "TYPE") 
    private String type; 
    @NotNull 
    @Column(name = "LOGIN") 
    private String login; 
    @NotNull 
    @Column(name = "EMAIL") 
    private String email; 
    /* ... */ 
} 

第二模型：UserInfo.java

import com.fasterxml.jackson.annotation.JsonBackReference; 
import javax.persistence.*; 
import java.io.Serializable; 

@Entity 
@Table(name = "USER_INFO") 
public class UserInfo implements Serializable { 

    @Id 
    @OneToOne(cascade = CascadeType.ALL) 
    @JoinColumns({ 
    @JoinColumn(name = "id", referencedColumnName = "id"), 
    @JoinColumn(name = "type", referencedColumnName = "type") 
    }) 
    @JsonBackReference 
    @MapsId 
    private User user; 

    @Column(name = "NAME") 
    private String name; 
    @Column(name = "SURNAME") 
    private String surname; 
    /* ... */ 
} 

组成主键：UserPK.java

import java.io.Serializable; 

public class UserPK implements Serializable { 
    private Long id; 
    private String type; 
    /* ... */ 
} 

弹簧CRUDRepository：UserRepository.java

import org.springframework.data.repository.CrudRepository; 
import org.springframework.stereotype.Repository; 

@Repository 
public interface UserRepository extends CrudRepository<User, UserPK> { 
    User findByIdAndAndType(Long id, String type); 
} 

库使用的EntityManager：UserRepositoryEM。java的

import org.springframework.stereotype.Repository; 
import javax.persistence.EntityManager; 
import javax.persistence.PersistenceContext; 
import javax.transaction.Transactional; 

@Repository 
@Transactional 
public class UserRepositoryEM { 

    @PersistenceContext 
    private EntityManager entityManager; 

    public User findByKey(UserPK key) { 
     return entityManager.find(User.class, key); 
    } 

    public User save(User user) { 
     entityManager.persist(user); 
     entityManager.flush(); 
     return user; 
    } 
} 

Answer 1

的User和UserPK类需要稍加修改。您的字段到主键的列映射应位于UserPK类中。这里有变化，

@Entity 
@Table(name = "USER") 
public class User implements Serializable { 

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "user") 
    @JsonManagedReference 
    private UserInfo info; 

    @EmbeddedId 
    private UserPK id; 

    @Column(name = "LOGIN", nullable = false) 
    private String login; 

    @Column(name = "EMAIL", nullable = false) 
    private String email; 
    /* ... */ 

    @Embeddable 
    @SequenceGenerator(name = "SEQ_ID", initialValue=1, allocationSize=100) 
    public static class UserPK implements Serializable { 

     @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQ_ID") 
     @Column(name = "ID", nullable = false) 
     private Long id; 

     @Column(name = "TYPE", nullable = false) 
     private String type; 
    } 
} 

相应的改动库，

@Repository 
public interface UserRepository extends CrudRepository<User, User.UserPK> { 
    User findByIdAndAndType(Long id, String type); 
}