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Posted to users@openjpa.apache.org by Christopher Schmidt <fa...@googlemail.com> on 2011/02/11 11:33:51 UTC
Composite Id Mapping question
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.
Creation works fine, but if I query for ObjectItemAssociationStatus the
fields subjObjItem and objObjItem are null !?
Is this because I used their columns in ObjectItemAssociation?
What would be the best way to map this (assuming that I did not do that)?
Thanks for helping
(I skipped some fields in the listings below)
--
Christopher
twitter: @fakod
blog: http://blog.fakod.eu
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;
. . . }
Fwd: Composite Id Mapping question
Posted by Christopher Schmidt <fa...@googlemail.com>.
Hi, I posted this already to the user list and got no answer...
I think there is an error while retrieving a instance of
ObjectItemAssociationStatus.
Both Id fields (subjObjItem and objObjItem) are null in this case.
The query I am executing is: "select o from ObjectItemAssociationStatus o
where o.ix = ?1 AND o.rptd.id = ?2"
Would be nice if someone could have a look at this.
Christopher
---------- Forwarded message ----------
From: Christopher Schmidt <fa...@googlemail.com>
Date: Fri, Feb 11, 2011 at 11:33 AM
Subject: Composite Id Mapping question
To: users@openjpa.apache.org
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.
Creation works fine, but if I query for ObjectItemAssociationStatus the
fields subjObjItem and objObjItem are null !?
Is this because I used their columns in ObjectItemAssociation?
What would be the best way to map this (assuming that I did not do that)?
Thanks for helping
(I skipped some fields in the listings below)
--
Christopher
twitter: @fakod
blog: http://blog.fakod.eu
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