Problem with mapping

debugx · **Joined:** Thu May 31, 2007 4:53 am **Posts:** 7

Hello, All.
I have two table in my DB. One table consist foreign key to other table.
I use folowing code to refference onto other table.

Code:

<set name="Classes" cascade="all">
      <key column="manufacturer_id"/>
      <one-to-many class="MyProg.DBManufacturer, DBProvider"/>
    </set>

Other table contains the next mapping code:

Code:

<many-to-one name="ManufacturerId"
          class="MyProg.DBRoll, DBProvider"
            column="manufacturer_id"/>

But an exception as apeared:
NHibernate.MappingException : Repated column in mapping for class MyProg.DBManufacturer should be mapped with insert="false" update="false": manufacturer_id

How can I resolve this problem?

Thanks

NHibernate version:1.0.2.0

himawan · **Joined:** Sat Aug 19, 2006 6:31 pm **Posts:** 139

You need to let hibernate know that one side of the relationship is the owner and the other side is not.

So the many side is usually the owner. So on the NON-owner side, set inverse=true.

<set name="Classes" cascade="all" inverse="true">