hi all
Im using Nhibernate in order to map my Classes in to DB. my problem is that when i Insert an Entity which relates with M:M to another Entity - the Entities are being inserted correctly but the connection table are not being updated with the 2 entities ID's. i am is there any mapping property that may prevent Nhibernate to update the connection table???
Thnks

Can you post your mapping file for this relationship?

Also, do you have it mapped as a bidirectional relationship? If so, do you have an Inverse side specified?

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0" namespace ="aaa.bbba.ccc" assembly="aaa.bbb.ccc.Impl">

<class name="Left" table="IntLefts" >

<id name="OIID" column="OIID" unsaved-value="00000000000000000000000000000000" type="String" >
<generator class="uuid.hex" />
</id>


<property name="ID" column="ID" type="Int32" />


<!-- Entity Specific Property -->
<property name="Name" column="Name" type="String" />

<!--Internals-->
<!--1:m-->




<!--m:m-->
<bag name="rights" table ="INTLEFTRIGHTS" inverse="true" cascade="all-delete-orphan" access="field" >
<key column="INTLEFTOIID"/>
<many-to-many class="right" column ="INTRIGHTOIID"/>
</bag>





<!--m:1-->

</class>
</hibernate-mapping>







<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0" namespace ="aaa.bbba.ccc" assembly="aaa.bbb.ccc.Impl">
<class name="Right" table="IntRight">

<id name="OIID" column="OIID" unsaved-value="00000000000000000000000000000000" type="String" >
<generator class="uuid.hex" />
</id>


<!-- Versionable Entity Properties -->
<property name="ID" column="ID" type="Int32" />

<!-- Entity Specific Property -->
<property name="Name" column="Name" type="String" />

<!--Internals-->

<!--m:m-->
<!--
<bag name="lefts" table ="INTLEFTRIGHTS" inverse="true" access="field" cascade="all-delete-orphan">
<key column="INTRIGHTOIID"/>
<many-to-many class="left" column ="INTLEFTOIID"/>
</bag>



<!--Externals-->
</class>
</hibernate-mapping>



those 2 mappings represent the M:M relationship - Nhibernate updates the M table but not the connection table
thnks

I noticed in each relationship mapping, that you have inverse="true". You should only specify one side as having inverse="true" instead of both. Here's a quote from the Hibernate manual:


That may explain why you aren't seeing that relationship table being updated.