if i guess correctly, you are trying to do a reverse onetomany.
After a lot of mistakes, i reached this solution for that:
@Entity
@Table (name="M_INVOICE")
public class Invoice {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name="ID_INVOICE", nullable=false)
private Long invoiceID;
@OneToMany(fetch=FetchType.LAZY,mappedBy="invoice",orphanRemoval=true,
cascade={CascadeType.ALL})
* @Column(name="ID_INVOICE") // means: this is a "reverse=true"
OneToMany (same as you can declare in a Hibernate HBM file)
* private List<InvoiceDetail> dettagli;
}
i think you miss the part in bold, which make the list really a REVERSE
oneToMany.
here the InvoiceDetail:
@Entity
@Table (name="M_INVOICE_DETAIL")
@IdClass(InvoiceDetailPK.class)
public class InvoiceDetail implements Serializable {
@Id
private Integer detailID;
@Id
private Invoice invoice;
.....
}
and the PKClass:
public class InvoiceDetailPK implements Serializable {
@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="ID_INVOICE")
private Fattura invoice;
@Column(name="ID_DETAIL", nullable=false,insertable= true,
updatable=true)
private Integer detailID;
.....
}
and remember,* EQUALS and HASHCODE only on PK fields*.
With this solution, you can save the entity and the list associated even if
they where not previously in session.
Finally, instead of *persist* i use *save* or *merge*. (I use spring
HibernateTemplate, never used Session directly)
Hope this can help,
Giulio
2012/3/22 George Christman <gchrist...@cardaddy.com>
> Hi Giulio,
>
> Yes, that is what I'm looking for. The only reason I can't commit it at
> this
> point is due to validation exceptions. My root entity does have many others
> related.
>
> here's a snippet of my root entity.
>
> @Entity
> public class PurchaseRequest {
>
> @Id
> @GeneratedValue
> @NonVisual
> private Long id;
>
> @Transient
> private long tempId = UUID.randomUUID().getLeastSignificantBits();
>
> @OneToMany(mappedBy = "purchaseRequest", cascade=CascadeType.ALL,
> orphanRemoval=true)
> private List<LineItem> lineItems;
>
> and some of my page code.
>
> private PurchaseRequest pr;
>
> @Inject //hibernate session
> private Session session;
>
> Class<?> onActivate(PurchaseRequest pr) {
> this.pr = pr;
> }
>
> void onValidate() {
> if (form.getHasErrors()) {
> session.persist(pr);
> }
> }
>
> --
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