[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-1134) subclass tag with discriminator in one to many mapping

[HG (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-1134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=37185#action_37185 ] 

HG commented on HHH-1134:
-------------------------

Well force="true" will solve the issue, but not if you use second level cache. While fetching the entity from a cache hibernate does not care if the force is true or not, simply because of the fact that discriminator information is not present in the CacheKey used by hibernate.

What can we do to have to have the same behaviour as "force='true'" with second level cache :( ???

> subclass tag with discriminator in one to many mapping
> ------------------------------------------------------
>
>                 Key: HHH-1134
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1134
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>         Environment: hibernate 3.0.5, Oracle
>            Reporter: Dilip Ranjith
>
> Consider the following hbm.xml file 
> <?xml version="1.0" encoding="UTF-8"?> 
> <!DOCTYPE hibernate-mapping PUBLIC 
>     "-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
>     "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
> <hibernate-mapping 
> > 
>     <class 
>         name="DCDTO" 
>         table="ACCDC" 
>         dynamic-update="true" 
>     > 
>         <id 
>             name="ID" 
>             type="java.lang.String" 
>         > 
>                 <column 
>                     name="DCINFOID" 
>                 /> 
>             <generator class="sequence"> 
>                 <param name="sequence">DSEQ</param> 
>               <!-- 
>                   To add non XDoclet generator parameters, create a file named 
>                   hibernate-generator-params-DebtorCreditorDTO.xml 
>                   containing the additional parameters and place it in your merge dir. 
>               --> 
>             </generator> 
>         </id> 
>         <discriminator 
>             column="accountType" 
>             not-null="true" 
>             type="java.lang.String" 
>             force="true" 
>             insert="true" 
>         /> 
>         <property 
>             name="creditMax" 
>             type="java.lang.Double" 
>             update="true" 
>             insert="true" 
>             column="creditMax" 
>         /> 
>  <subclass 
>             name="CDTO" 
>             dynamic-update="true" 
>             dynamic-insert="true" 
>             discriminator-value="C" 
>         > 
> </.subclass> 
>  <subclass 
>             name="DDTO" 
>             dynamic-update="true" 
>             dynamic-insert="true" 
>             discriminator-value="D" 
>         > 
> </.subclass> 
> </class> 
> </hibernate-mapping> 
> DCDTO is the super class while DDTO and CDTO are its child classes 
> If in a mapped object say  TDTO   there are a set of CDTOs and a separate set of DDTOs
> when we get TDTO  the where clause "where  accountType='D'  " is not there when the query for set of DDTOs are generated. so instead of a set of DDTOs i am getting a set of both DDTO's and CDTO's

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