Hi,

I've tried this for the last couple of days and read loads of posts to that:
I want to store countries. Each country can have 1 or more regions attached to it.

These are the mappings (generated with XDooclet):

Country.hbm.xml
[code]
<hibernate-mapping>
<class
name="org.iaeste.at.is.domain.Country"
table="Country"
proxy="org.iaeste.at.is.domain.Country"
dynamic-update="false"
dynamic-insert="false"
>

<id name="id" column="id" type="long" unsaved-value="0" >
<generator class="native" />
</id>

<property name="code" type="string" update="true" insert="true"

Hi,

I finally found the error: the unsaved value has to be set in regions! I've only tried it in country :-(
And the unsaved-value attribute has to match the actual value of the id set in the constructor.

Philipp