Harris,
That extra table IS necessary. That is the way that ALL relationships
are managed by the ejb container.
myParent
--------------
myParentPK
myParentData1
myParentData2
myChild
--------------
myChildPK
myChildData1
Relationship: Parent has Children Containment (1 -> N Bi-directional)
myParent_myChild
----------------
myParentPK
myChildPK
This allows trivial bi-directionality in a 1 -> N, even if it's
uni-directional, the same construct can be used. In the case of
bi-directional 1 -> N the table is in fact necessary as there's no way,
except perhaps to use a Collection of myChildPK's attribute in myParent,
to back reference the myChild relationships from the myParent object.
- Scot
Harris Simon wrote:
>
> I am trying to get a bi-directional container managed relationship working
> in Orion 1.5.2 but it keeps creating an intermediate table. Is there anyway
> to stop this? There is no need for the extra table.
>
> Here is my example:
>
> Change[1]----->[*]Objection
>
> create table change (
> change_id integer primary key
> )
>
> create table objection (
> objection_id integer primary key,
> change_id integer
> )
>
> <ejb-relation>
> <ejb-relation-name>Change-Objection</ejb-relation-name>
> <ejb-relationship-role>
>
> <ejb-relationship-role-name>change-has-objections</ejb-relationship-role-nam
> e>
> <multiplicity>One</multiplicity>
> <role-source>
> <ejb-name>Change</ejb-name>
> </role-source>
> <cmr-field>
> <cmr-field-name>objections</cmr-field-name>
> <cmr-field-type>java.util.Set</cmr-field-type>
> </cmr-field>
> </ejb-relationship-role>
> <ejb-relationship-role>
>
> <ejb-relationship-role-name>objection-belongsto-change</ejb-relationship-rol
> e-name>
> <multiplicity>Many</multiplicity>
> <cascade-delete/>
> <role-source>
> <ejb-name>Objection</ejb-name>
> </role-source>
> <cmr-field>
> <cmr-field-name>change</cmr-field-name>
> </cmr-field>
> </ejb-relationship-role>
> </ejb-relation>
>
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--
scot weber - [EMAIL PROTECTED]
-------------
Given a choice between a folly and a sacrament, one should
always choose the folly -- because we know a sacrament
will not bring us closer to God and there's always a chance
that a folly will. - Erasmus
The only man who never makes a mistake is the man who
never does anything. - Theodore Roosevelt.
