我試圖使用春天CRUDRepository使用JPA的數據庫模型中插入新的對象到數據庫(User.java,UserInfo.java)。數據庫模型與複合主鍵相關(UserPK.java),其中一個是自動生成的(字段名爲id),第二個(字段名爲類型)在開始時設置。春天CrudRepository無法股價生成的ID複合主鍵
而且我得到的錯誤,當我創建新的對象,使用CRUDRepository(UserRepository.java) - 不能插入新的對象爲第二個模型(UserInfo.java),因爲ID爲空(第一種模式被正確添加)。我認爲問題在於共享/映射數據庫模型中的複合主鍵。 我嘗試了與EntityManager相同的模型,它不是錯誤 - 所有被添加。接下來我用@PrimaryKeyJoinColumns註釋,但是與上面的結果相同(但我不確定我是否正確使用它) - CRUDRepository失敗,並且EntityManager成功。
任何人都可以幫我找到解決辦法嗎?如果有人想運行代碼,我還會在GitHub上添加源代碼。
日誌如下:
登錄以下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]
...
登錄的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 (?, ?, ?, ?)
代碼:
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;
/* ... */
}
組成主鍵:UserPK.java
import java.io.Serializable;
public class UserPK implements Serializable {
private Long id;
private String type;
/* ... */
}
彈簧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);
}
庫使用的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;
}
}
感謝響應,我更改代碼,你說:** ** UserPK.java,** ** User.java + ** UserRepository.java **。您可以在[GitHub](https://github.com/kaczla/SpringBootCompositePrimaryKey/tree/embeddedid)上查看更改。現在是其他問題,無法生成密鑰 - 即使我設置了密鑰,也無法共享到** UserInfo.java ** – kaczla
對UserPK類的wrt序列生成器做了一些修改。現在就試試。 –
我更改** UserPK.java **,但它沒有幫助。查看日誌,hibernate沒有爲** UserPK.java **創建序列器,所以自動生成的id不能用@Embeddable註釋或者我們做錯了。 另一方面,我解決了共享/映射覆合主鍵的問題 - 我只是在** UserInfo.java **中添加了* @ EmbeddedId *註釋。當然你可以看到[GitHub](https://github.com/kaczla/SpringBootCompositePrimaryKey/tree/embeddedid) – kaczla