<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="PersistenceLayer.Entity, PersistenceLayer" table="entities">
    <id name="Id" column="typeId" type="String">
      <generator class="uuid.hex" />
    </id>
    <property name="Name" column="name" type="string" />
    <property name="Description" column="description" type="string" />

    <idbag name="ChildEntities" table="entities_attributes" cascade="all">
      <collection-id type="String" column="types_attributes_id">
        <generator class="uuid.hex" />
      </collection-id>
      <key column="entityId" />
      <composite-element class="PersistenceLayer.CompositeElements.EntityAttribute, PersistenceLayer">
        <property name="Value" column="value" />
        <many-to-one name="Attribute" column="attributeId" class="PersistenceLayer.Attribute, PersistenceLayer" lazy="false" />
      </composite-element>
    </idbag>

    <bag name="Changes" cascade="all">
      <key column="typeId" />
      <one-to-many class="PersistenceLayer.History, PersistenceLayer" />
    </bag>
  </class>
</hibernate-mapping>

Test method TypeServiceTest.CopyTypeTest threw exception:  Spring.Data.UncategorizedAdoException: Hibernate operation: could not delete: [PersistenceLayer.Entity#b120088015fc4881991172f7a2fbbe72][SQL: DELETE FROM entities WHERE entityId = ?]; uncategorized DataException for SQL [DELETE FROM entities WHERE entityId = ?]; ErrorCode [<no error code>]; ORA-02292: Verstoß gegen Constraint (DB.FKB029AD7E7D46EB33). Untergeordneter Datensatz gefunden.
--->  System.Data.OracleClient.OracleException: ORA-02292: Verstoß gegen Constraint (DB.FKB029AD7E7D46EB33). Untergeordneter Datensatz gefunden.
.

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">

    <class  name="Nhd.Poco1, Runner"
            table="Poco1">

        <id name="Id" column="Poco1_Id">
            <generator class="native"/>
        </id>

        <property       name="Name"             column="Name"/>

        <idbag name="Children" table="poco1_join_poco2" cascade="all">
          <collection-id type="String" column="join_id">
            <generator class="uuid.hex" />
          </collection-id>
          <key column="Poco1_id" />
          <composite-element class="Nhd.Poco1Join, Runner">
            <many-to-one name="Poco2" column="Poco2_id" class="Nhd.Poco2, Runner" lazy="false"/>
          </composite-element>
        </idbag>
    </class>

</hibernate-mapping>