Hi all,
I have a problem with the best mapping of two tables: obj_item_assoc and obj_item_assoc_stat. Both share 3 of its primary keys. The "XXX_obj_item" primary keys are a fk's to the entity ObjectItem - thats why I modeled it as @ManyToOne relations.
Is this generally OK how I did this (see below)?
Unfortunately this is not working with OpenJPA. So - thats why I am asking this here ;-)
Thanks Christopher
TABLE obj_item_assoc
(
subj_obj_item_id numeric(20,0) NOT NULL,
obj_obj_item_id numeric(20,0) NOT NULL,
obj_item_assoc_ix numeric(20,0) NOT NULL,
CONSTRAINT obj_item_assoc_pkey PRIMARY KEY (subj_obj_item_id, obj_obj_item_id, obj_item_assoc_ix),
CONSTRAINT obj_item_assoc_obj_obj_item_id_fkey FOREIGN KEY (obj_obj_item_id)
REFERENCES obj_item (obj_item_id),
CONSTRAINT obj_item_assoc_subj_obj_item_id_fkey FOREIGN KEY (subj_obj_item_id)
REFERENCES obj_item (obj_item_id)
)
TABLE obj_item_assoc_stat
(
subj_obj_item_id numeric(20,0) NOT NULL,
obj_obj_item_id numeric(20,0) NOT NULL,
obj_item_assoc_ix numeric(20,0) NOT NULL,
obj_item_assoc_stat_ix numeric(20,0) NOT NULL,
CONSTRAINT obj_item_assoc_stat_pkey PRIMARY KEY (subj_obj_item_id, obj_obj_item_id, obj_item_assoc_ix, obj_item_assoc_stat_ix),
CONSTRAINT obj_item_assoc_stat_subj_obj_item_id_fkey FOREIGN KEY (subj_obj_item_id, obj_obj_item_id, obj_item_assoc_ix)
REFERENCES obj_item_assoc (subj_obj_item_id, obj_obj_item_id, obj_item_assoc_ix) )
@Entity
@Table(name = "obj_item_assoc_stat")
@IdClass(ObjectItemAssociationStatus.ObjectItemAssociationStatusId.class)
public class ObjectItemAssociationStatus extends LoggableEntity {
@Id
@Column(name = "obj_item_assoc_stat_ix", nullable = false, length = 20)
protected BigInteger ix;
@Id
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "subj_obj_item_id", nullable = false, updatable = false)
protected ObjectItem subjObjItem;
@Id
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "obj_obj_item_id", nullable = false, updatable = false)
protected ObjectItem objObjItem;
@Id
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumns({@JoinColumn(name = "subj_obj_item_id", referencedColumnName = "subj_obj_item_id", nullable = false),
@JoinColumn(name = "obj_obj_item_id", referencedColumnName = "obj_obj_item_id", nullable = false),
@JoinColumn(name = "obj_item_assoc_ix", referencedColumnName = "obj_item_assoc_ix", nullable = false)})
protected ObjectItemAssociation objItemAssoc;
. . . }
@Entity
@Table(name = "obj_item_assoc")
@IdClass(ObjectItemAssociation.ObjectItemAssociationId.class)
public class ObjectItemAssociation extends NonIndependentEntity {
@Id
@Column(name = "obj_item_assoc_ix", nullable = false, length = 20)
protected BigInteger ix;
@Id
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "subj_obj_item_id", nullable = false, updatable = false)
protected ObjectItem subjObjItem;
@Id
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "obj_obj_item_id", nullable = false, updatable = false)
protected ObjectItem objObjItem;
. . . }
--
Christopher
twitter: @fakod
blog:
http://blog.fakod.eu
