Mailing-List: contact dev-help@openjpa.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@openjpa.apache.org
Received-SPF: pass (athena.apache.org: domain of fakod666@googlemail.com
 designates 209.85.214.174 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=googlemail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        b=HCsXM7C4ct1pqhpEfkFo4Yi9ag600NuP6OO7hguLUrj2BRjzzWk7Rc5+1jwTlkmVz7
         +T/pRg9up10SbfP/6Z/bA/Vot0vXcsj0+1srNEqnRMq5xWjiiGhnAMO+NSAwnqSzbnVj
         7vHox7FLz+vZV2wCsqhrsDSTCgWnzSJvLmh8I=
MIME-Version: 1.0
In-Reply-To: <AANLkTinz49hk900oKRDu0HYq0MErTMA5N7RF8jZ4Hber@mail.gmail.com>
References: <AANLkTinz49hk900oKRDu0HYq0MErTMA5N7RF8jZ4Hber@mail.gmail.com>
Date: Mon, 14 Feb 2011 10:14:47 +0100
Message-ID: <AANLkTinV11Mv=388wFEXrdJ38VZh_9hF8RXCgLo_eAbG@mail.gmail.com>
Subject: Fwd: Composite Id Mapping question
From: Christopher Schmidt <fakod666@googlemail.com>
To: dev@openjpa.apache.org
Content-Type: multipart/alternative; boundary=005045014712b76e8c049c3a7a23

--005045014712b76e8c049c3a7a23
Content-Type: text/plain; charset=ISO-8859-1

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 <fakod666@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

--005045014712b76e8c049c3a7a23--