我有两个有关系的实体(休眠)。当我通过 JPA Repository 获取实体时,hibernate 会对两个实体进行“选择”。我如何通过一个选择来获取实体(此时我不需要第二个实体)。
抱歉我的英语和技术语言 - 我是初学者。
编辑
用户:
@Entity
public class User {
@Id
@GeneratedValue
private int id;
private String name;
@OneToMany(mappedBy = "user", fetch = FetchType.EAGER)
private List<Medicament> medicaments;
//and others and getters and setters
}
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药剂:
@Entity
public class Medicament {
@Id
@GeneratedValue
private int id;
private String name;
@ManyToOne
@JoinColumn(name = "user_id")
private User user;
//and others and getters and setters
}
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我从自动装配接口 UserRepository 调用方法:
public interface UserRepository extends JpaRepository<User, Integer>{
@Query("select u from User …Run Code Online (Sandbox Code Playgroud)