I have 1 entity call Item in which I want to be able to link parent items to children. to use a join table to create a parent/child relationship. I haven't been able to get any good documentation on. So if anyone has any thoughts I'm all ears.
Here is what I have... which works most of the time.
public class Item implements java.io.Serializable {
@Id
private Long id;
@ManyToOne(optional = true, fetch = FetchType.LAZY)
@JoinTable(name = "ITEMTOITEM", joinColumns = { @JoinColumn(name = "ITEMID") }, inverseJoinColumns = { @JoinColumn(name = "PARENTITEMID") } )
private Item parent;
@OneToMany(mappedBy = "parent", fetch = FetchType.LAZY)
private List<Item> children;
}
At times when I want to bring back objects that are tied to this item table I am getting an error of the following:
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.webflow.engine.ActionExecutionException: Exception thrown executing [AnnotatedAction@6669ff5 targetAction = com.assisted.movein.web.common.nav.NavAction@6edf74b7, attributes = map['method' -> 'handleEntry']] in state 'oneTimeChargesAndFeesView' of flow 'in-flow' -- action execution attributes were 'map['method' -> 'handleEntry']'; nested exception is Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0.1 (Build b04-fcs (04/11/2008))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: ORA-00904: "PARENTITEM_ITEMID": invalid identifier
Error Code: 904
Call: SELECT ITEMID, ITEMSHORTDESC, EFFENDDATE, ITEMDESC, PARENTITEM_ITEMID, ITEMTYPECODE FROM ITEM WHERE (ITEMID = ?)
bind => [1250]
Query: ReadObjectQuery(com.domain.Item)
Any help would be appreciated.
Try to use @JoinColumn
instead:
@ManyToOne(optional = true, fetch = FetchType.LAZY)
@JoinColumn(name = "PARENTITEMID", referencedColumnName = "ITEMID")
private Item parent;
@OneToMany(
cascade = {CascadeType.ALL},
orphanRemoval = true,
fetch = FetchType.LAZY
)
@JoinColumn(name = "PARENTITEMID")
private List<Item> children;