![](/img/trans.png)
[英]Hibernate/Spring Data not fetching collection in OneToMany mapping
[英]HIbernate ignore fetching data from OnetoMany field
我想忽略实体中的@OnetoMany
字段。 获取数据需要获取实际字段但不想触发对依赖表的查询。 但是从父表中删除数据需要从依赖表中删除
我试过忽略但删除也被忽略的@Transient
。 当我调用父实体时,还有其他选项可以告诉 JPA 不要从子表中获取数据吗?
@Entity
Table(name = "User")
public class UserEntity implements Serializable {
@Id
@Column(name = "id")
private int id;
@Column(name = "SERIAL", unique = true, nullable = false)
private String serial;
@OneToMany(mappedBy = "serialBySerialId", cascade = CascadeType.ALL)
private Set<UserActionEntity> userActionsById;
}
@Table(name = "user_action")
public class UserActionEntity implements Serializable {
@Id
@Column(name = "id")
private int id;
@Column(name = "action")
private String action;
@ManyToOne
@JoinColumn(name = "USER_ID", referencedColumnName = "ID", nullable = false)
private UserEntity userByUserId;
如果您不想触发对依赖表的查询,您可以在 UserActionEntity 属性上使用 (fetch = FetchType.LAZY)。
@OneToMany(mappedBy = "serialBySerialId", cascade = CascadeType.ALL, fetch = FetchType.LAZY)
private Set<UserActionEntity> userActionsById;
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.