Hibernate 级联保存失败，Hibernate defect
使用annotation方式标注Payment和PaymentEntry. ID都是用自己设定策略assigned。

@Entity@Table(name = "LO_CONF_PAYMENT")public class PaymentBillDO implements Serializable{@Transientprivate static final long serialVersionUID = 206001219164196538L;@Id@Column(name = "ID", length = 50)@GeneratedValue(generator = "c-assigned")@GenericGenerator(name = "c-assigned", strategy = "assigned")private String ID; @OneToMany(mappedBy ="parent",targetEntity = PaymentBillEntryDO.class, fetch = FetchType.LAZY)@Cascade({ CascadeType.ALL})private List<PaymentBillEntryDO> Entries;}

@Entity@Table(name = "LO_CONF_PAYMENTENTRY")public class PaymentBillEntryDO implements Serializable {private static final long serialVersionUID = 6913338048891980882L;@Id@Column(name = "ID", length = 50)@GeneratedValue(generator = "c-assigned")@GenericGenerator(name = "c-assigned", strategy = "assigned")private Long ID;@ManyToOne( targetEntity = PaymentBillDO.class, fetch = FetchType.EAGER)@JoinColumn(name = "PARENT_ID", nullable = false)@Cascade({ CascadeType.REFRESH })private PaymentBillDO  parent;

无论怎么测试，都不能级联保存。
搜索了无数网页，中文的，英文都，都没有解。搜到过一点点有用的资料，就是把@Cascade有JPA的annotaion换成Hibernate的annotaion。其他的各种sample都只是对hibernate reference的抄袭而已。
于是只能debug hibernate。在类DelegatingStatement的executeBatch方法中居然发现了对entry的cascade update语句，而不是想象中的Insert语句。想了一下，难道hibernate如果发现entry 有ID的话，就判断对entry进行级联update，而不是进行insert。 后来把ID生成策略换成了SEQUENCE，解决问题。

崩溃啊。
新的Entry的annotation为

@Entity@Table(name = "LO_CONF_PAYMENTENTRY")public class PaymentBillEntryDO implements Serializable {private static final long serialVersionUID = 6913338048891980882L;@Id@Column(name = "ID", length = 50)@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "paymentbillEntry_seq")      @SequenceGenerator(name = "paymentbillEntry_seq", sequenceName = "SEQ_LO_CONF_PAYMENT_ENTRY")private Long ID;@ManyToOne( targetEntity = ElementEventRelationshipDO.class, fetch = FetchType.EAGER)@JoinColumn(name = "PARENT_ID", nullable = false)@Cascade({ CascadeType.REFRESH })private PaymentBillDO  parent;

希望大家出现这个问题的时候，搜到的答案不仅仅是copy reference而已。
1 楼 humaeks 2011-04-03 弱弱的问下你保存调用的是哪个API？ 2 楼 yoyoroc 2011-04-03 getHibernateTemplate().save();