[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-4014) One-to-one: property-ref: foreign key: composite-id

[Sandeep Vaid (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-4014?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=33539#action_33539 ] 

Sandeep Vaid commented on HHH-4014:
-----------------------------------

Ans B) The problem is of constrained="true" condition. It should be on proper one-to-one relationship.  
         For more details see Java Persistence With Hibernate book, section 7.1.1 The foreign identifier generator.

Now this issue if resolved. Please close this issue..

> One-to-one: property-ref: foreign key: composite-id
> ---------------------------------------------------
>
>                 Key: HHH-4014
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-4014
>             Project: Hibernate Core
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.4.sp1, 3.2.5, 3.2.6, 3.2.7, 3.3.0.CR1, 3.3.0.CR2, 3.3.0.GA, 3.3.0.SP1, 3.3.1, 3.3.2
>         Environment: Hibernate Version 3.2.6, Database Db2
>            Reporter: Sandeep Vaid
>            Priority: Blocker
>
> Presently there is no way in hibernate using which we can specify one-to-one relationship with property-ref to part of composite-id 
> of another entity. The following scenario will clarify the above statement.
> There is a one-to-one relationship between Product and ProductBasic.
> Product -----> productId (PK)
> ProductBasic ----> pId, useCode, StartTime (as composite key) and pId is also foreign key referencing Product.
> This is a legacy database. We get one-to-one relationship by using the condition:
>  Product.productId=ProductBasic.pId and useCode='008' and startTime<currentTime<endTime.
>  
>  In Product.hbm.xml:
>  <one-to-one name="productBasic" cascade="save-update" property-ref="activeProduct" constrained="true">
>      <formula>PRODUCTID</formula>
>  </one-to-one>
>  
>  In ProductBasic.hbm.xml
>   <composite-id name="compProductBasic"> 
>     <key-property name="pId" column="PID" ></key-property>
>     <key-property name="useCode" column="USECODE" "></key-property>
>     <key-property name="startTime" column="STARTTIME" ></key-property>
>   </composite-id>
>   
>   <properties name="activeProduct">
>     <property name="compProductBasic.pId" class="Product"  insert="false" update="false" lazy="proxy" />
>   </properties>
>  
>  
>  If my relationship is Product.productId = ProductBasic.pId, there is no way in hibernate to specify this relationship.
>  Moreover we cannot remap(refer to) the property of composite-id (compProductBasic.pId in current example)..
>  
>  Hence i request for enhancement in hibernate to incorporate this.

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