[jbosstools-issues] [JBoss JIRA] Commented: (JBIDE-4201) Discriminator of RootClass is not exported.

[Dmitry Geraskov (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBIDE-4201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12463123#action_12463123 ] 

Dmitry Geraskov commented on JBIDE-4201:
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When I was working under this bug I found interesting thing:
when used xml mapping discriminator is required for such hierarchy mapping,
but it is not required when annotation mapping used.
For annotation mapping hibernate itself creates discriminator value with "string" type and "DTYPE" column when @Discriminator is not set.
Why we have such inconsistency?

> Discriminator of RootClass is not exported.
> -------------------------------------------
>
>                 Key: JBIDE-4201
>                 URL: https://jira.jboss.org/jira/browse/JBIDE-4201
>             Project: Tools (JBoss Tools)
>          Issue Type: Sub-task
>          Components: Hibernate
>    Affects Versions: 3.0.0.GA
>            Reporter: Dmitry Geraskov
>            Assignee: Max Rydahl Andersen
>             Fix For: 3.1.0.M1
>
>         Attachments: patch.txt
>
>
> RootClass.discriminator value used to determine discriminator type and columns when table-pre-type-hierarchy used in mapping, but element discriminator never exported and sessionFactory can't be built for such configuration:
> org.hibernate.MappingException: No discriminator found for com.jboss.dvd.seam.Admin. Discriminator is needed when 'single-table-per-hierarchy' is used and a class has subclasses
> org.hibernate.MappingException: No discriminator found for com.jboss.dvd.seam.Admin. Discriminator is needed when 'single-table-per-hierarchy' is used and a class has subclasses
> at org.hibernate.mapping.SingleTableSubclass.validate(SingleTableSubclass.java:41)
> at org.hibernate.cfg.Configuration.validate(Configuration.java:1102)
> at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1287)
> at org.hibernate.console.ConsoleConfiguration$3.execute(ConsoleConfiguration.java:502)
> at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:64)
> at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:95)
> at org.hibernate.console.ConsoleConfiguration.buildSessionFactory(ConsoleConfiguration.java:497)
> ...

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