Question

我是新的Hibernate / JPA。从父元素中删除子元素时遇到问题。下面是我的实体类SourceMaster和SegmentMaster。

@Entity
public class SourceMaster implements Serializable{
    @EmbeddedId
    private SourceMasterKey id;//Primary Key is composite key. Combination of SOURCE_ID&DOMAIN_ID
    @OneToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER, mappedBy = "sourceTable") //I don't want to delete children
    private List<SegmentMaster> segmentList = new ArrayList<>();
}

@Entity
public class SegmentMaster implements Serializable{
    @EmbeddedId
    private SegmentMasterKey id;//Primary Key is composite key. Combination of SEGMENT_NAME&CA_DOMAIN_ID
    @ManyToOne (optional = false) //FK to SourceMaster table
    @JoinColumns({
         @JoinColumn(name = "SOURCE_ID", nullable = false, referencedColumnName = "SOURCE_ID", insertable = false, updatable = false),
         @JoinColumn(name = "DOMAIN_ID", nullable = false, referencedColumnName = "DOMAIN_ID", insertable = false, updatable = false)})
    private SourceMaster sourceTable; 
}

委托课程

public class SourceMasterDelegate{ 
 sourceMasterDAO.delete(SourceMaster); // Works as intended, returns me integrity constraint violated - child record found
}

public class SegmentMasterDelegate{
sourceMasterDAO.delete(SegmentMaster);//Problem here. It is not deleting SegmentMaster record, not giving exception or not logging any exception.

//It executes select statements on SegmentMaster and SourceMaster tables. but delete Query executing is never seen. 
}


public class HDAOImpl implements GenericDAO<T> {
    @Transactional
    public void delete(T object) {
        entityManager.remove(object);
        entityManager.flush();
    }

关联有什么问题吗？为什么我在这种情况下无法删除子记录？

这是我得到的最接近的答案，但这不起作用或我做错了可能是 - ＆gt; Using JPA with Hibernate implementation: entityManager.remove - not working

任何指针都会很棒！请建议

EntityManager.Remove不会删除具有ManyToOne关系的实体

0 个答案: