[Hibernate-issues] [Hibernate-JIRA] Created: (HHH-1966) Eqal rows in key and many-to-many mapping causes a "org.hibernate.MappingException: Repeated column in mapping for collection:"

[Martin G. (JIRA) <no...@at...>]

Eqal rows in key and many-to-many mapping causes a  "org.hibernate.MappingException: Repeated column in mapping for collection:"
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         Key: HHH-1966
         URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1966
     Project: Hibernate3
        Type: Bug

    Reporter: Martin Graml


There are 2 Tables
Table A contains Project items with different attributes
Table B contains the linking between this Project items

Each item can have 0..n Subitems


<hibernate-mapping>
      <class name="ProjectItem"table="project_items">
      <composite-id>
           <key-property name="ItemNumber" type="string" column="Item_Number" />
           <key-property name="ProjectNumber" type="string" column="Project_Number" />
      </composite-id>
....
....

     <map name="SubItems" table="Project_Item_Linking" sort="natural">
          <key>
               <column name="is_part_of" />
               <column name="Project_Number" />
          </key>
          <index column="Position" type="integer" />
          <many-to-many class="ProjectItem">
               <column name="Item_Number" />
               <column name="Project_Number" />
          </many-to-many>
     </map>

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