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answers:

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Hi all:

I was wondering if anyone has tried to do this in NHibernate.

I have the following tables (simpify version).

CITY: city (varchar2) (PK) province (varchar2) (PK)

CITY_TL: city (varchar2) (PK) province (varchar2) (PK) lang (char (2)) (PK)

LOCATION: location (varchar2) (PK) some other column.

As you can see, there are no relationship between CITY and LOCATION. However, it was set up in a way that CITY.Province can equal to LOCATION.Location. So, I can execute a query like this:

select c.* from city c join city_tl ctl on c.city = ctl.city join location l on l.location = c.province

How do I do that in NHibernate? Is this even doable?

Here is my mapping files for CITY and LOCATION

CITY:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                   assembly="NHDAL"
                   namespace="NHDAL.Domain">

  <class name="CityTL" table="CITY_TL">
    <composite-id>
      <key-property column="CITY" type="String" name="Name"/>
      <key-property column="PROVINCE" type="String" name="Province"/>
      <key-property column="LANG" type="String" name="Lang" />
    </composite-id>

    <timestamp
        column="MODIFY_DATE"
        name="ModifyDate"
        access="property"
        unsaved-value="null"/>

    <property name="ProvinceDescription" column="PROVINCE_TL"
type="String" not-null="true" />
    <property name="Description" column="CITY_TL" type="String" not-
null="true"/>
    <property name="SortOrder" column="SORT_ORDER" type="Int32" not-
null="false"/>

    <many-to-one name="City" class="City">
      <column name="CITY"/>
      <column name="PROVINCE"/>
    </many-to-one>
  </class>

</hibernate-mapping>

LOCATION:

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                   assembly="NHDAL"
                   namespace="NHDAL.Domain">

  <class name="Location" table="LOCATION">
    <id column="LOCATION" name="Name">
      <generator class="assigned" />
    </id>

    <timestamp
        column="MODIFY_DATE"
        name="ModifyDate"
        access="property"
        unsaved-value="null"/>

      </class>

</hibernate-mapping>

Can someone shine some light on this and tell me what should the query look like in NHibernate?