[hibernate-issues] [Hibernate-JIRA] Commented: (HBX-815) [hbmlint] Detect repeated columns

[Kannan Ekanath (JIRA)]

    [ http://opensource.atlassian.com/projects/hibernate/browse/HBX-815?page=comments#action_25317 ] 

Kannan Ekanath commented on HBX-815:
------------------------------------

http://forum.hibernate.org/viewtopic.php?t=967323&highlight=

Is this the same issue as well? A class hierarchy like this.

class A {
    @Embedded
    C someRef;
}

class B extends A {
    @Embedded
    @AttributeOverrides (...override to point to different columns...)
    C someOtherRefInstance;
}

class C {
    String name;
} 

gives an error saying, Repeated column in mapping for entity: com.B column: referred_inventory_item (should be mapped with insert="false" update="false") even after setting attribute overrides values 

> [hbmlint] Detect repeated columns
> ---------------------------------
>
>          Key: HBX-815
>          URL: http://opensource.atlassian.com/projects/hibernate/browse/HBX-815
>      Project: Hibernate Tools
>         Type: New Feature

>   Components: hbmlint
>     Versions: 3.2beta8
>  Environment: hibernate v3.2, MySQL 5.1.12-beta-community-nt
>     Reporter: David Balažic

>
>
> (verbatim from the forum , http://forum.hibernate.org/viewtopic.php?t=967007 )
> Hi!
> I use hbm2ddl (from Hibernate Tools v3.2 beta 8) to create the DB schema and noticed, that duplicate column names are not detected.
> Example:
> <?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 package="com.manning.hq.stein.data">
>    <class name="TelefonskiImenik">
>       <id name="id" column="imid">
>          <generator class="native" />
>       </id>
>       <property name="izdajatelj" column="col"/>
>       <property name="verzija" column="col"/>
>    </class>
> </hibernate-mapping>
> The same thing happens if one column name is implicit :
>       <property name="izdajatelj" column="verzija"/>
>       <property name="verzija"/>
> If I try to use this mapping with an application, hibernate (v3.2) fails (in both cases) in buildSessionFactory() :
> Exception in thread "main" org.hibernate.MappingException: Repeated column in mapping for entity: com.manning.hq.stein.data.TelefonskiImenik column: verzija (should be mapped with insert="false" update="false")
> at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:605)
> at org.hibernate.mapping.PersistentClass.checkPropertyColumnDuplication(PersistentClass.java:627)
> at org.hibernate.mapping.PersistentClass.checkColumnDuplication(PersistentClass.java:645)
> at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:420)
> at org.hibernate.mapping.RootClass.validate(RootClass.java:192)
> at org.hibernate.cfg.Configuration.validate(Configuration.java:1026)
> at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1211)
> at com.manning.hq.stein.Main2.persist_all(Main2.java:284)
> at com.manning.hq.stein.Main2.main(Main2.java:45)
> While this is not a severe bug, it would be nice to detect it as early as possible.

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