PriceListDefinition mapping

PriceList

  <class xmlns="urn:nhibernate-mapping-2.2" lazy="true" schema="timetables" name="PriceList" table="PriceLists">
    <id name="ID/>
    <discriminator type="String">
      <column name="discriminator" />
    </discriminator>
    <version name="Version">
      <column name="Version" />
    </version>
    <property name="Number" type="System.Int32">
      <column name="Number" not-null="true" />
    </property>
    <subclass name="ByKilometer" />
    <subclass name="ByTabularItem" />
  </class>

PriceListDefinition

  <class xmlns="urn:nhibernate-mapping-2.2" lazy="true" schema="timetables" name="PriceListDefinition" table="PriceListDefinitions">
    <id name="ID"/>
    <discriminator type="String">
      <column name="discriminator" />
    </discriminator>
    <property name="Priority" type="System.Int32, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
      <column name="Priority" not-null="true" />
    </property>
    <many-to-one cascade="save-update" class="CourseVariant" foreign-key="FK_PriceListDefinitions_CourseVariant" lazy="proxy" name="CourseVariant">
      <column name="CourseVariant_Id" index="IX_PriceListDefinitions_CourseVariant" not-null="false" />
    </many-to-one>
    <subclass name="KilometerDefinition">
      <many-to-one access="field.camelcase-underscore" cascade="save-update" class="ByKilometer" foreign-key="FK_KilometerDefinitions_PriceList" lazy="no-proxy" name="PriceList">
        <column name="PriceList_Id" index="IX_KilometerDefinitions_PriceList" not-null="false" />
      </many-to-one>
    </subclass>
    <subclass name="TabularDefinition">
      <many-to-one access="field.camelcase-underscore" cascade="save-update" class="ByTabularItem" foreign-key="FK_TabularDefinitions_PriceList" lazy="no-proxy" name="PriceList">
        <column name="PriceList_Id" index="IX_TabularDefinitions_PriceList" not-null="false" />
      </many-to-one>
    </subclass>
  </class>

Seems (or I assume) that the PriceList is not mapped directly to the database as a table (although subclasses are) so nhibernate needs to "guess the type" from the first mapping available which is ByKilometer in this case. You can verify if switching the order of KilometerDefinition and TabularDefinition suddenly gives the expected subclass. But i will try to compile it and test it tomorrow.

Thanks. Looking forward for Your test. After 6 hours I give up (today).

PS
I added PriceList mapping.

I gave up. Replaced reference to PriceListId property.