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HIbernate Filters + User Defined Types

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shardul.bhatt

Post subject: HIbernate Filters + User Defined Types

Posted: Thu Sep 04, 2008 10:02 am

Beginner

Joined: Fri Sep 08, 2006 7:29 am
Posts: 36

Hi All,

I am trying to use Hibernate Filters and apply filtering on User defined Types. It seems Hibernate Filters are unable to map to columns having user defined types.

Also, I am not sure if in the filter-def configuration the type used should be String or the EnumType

All the details are given below.

Can anybody please help!!!

Regards,
Shardul.

Hibernate version:

Code:

Hibernate 3

Mapping documents:

Excerpt of Mapping Doc

User Defined Type

Code:

<typedef name="courseLengthUnitType"
      class="module.commons.dao.tool.EnumUserType">
      <param name="enumClassName">
         module.xxxx.model.type.LengthUnitType
      </param>
   </typedef>

<class>
<property name="lengthUnit" type="courseLengthUnitType">
            <column name="length_unit" length="32" not-null="false"/>
      </property>

<filter name="courseYearLengthUnitFilter" condition="lengthUnit IN (:courseYearLengthUnit)"></filter>

</class>

<filter-def name="courseYearLengthUnitFilter">
      <filter-param name="courseYearLengthUnit" type="java.lang.String"></filter-param>
   </filter-def>

Full stack trace of any exception that occurs:

Code:

19:01:38,866 ERROR [JDBCExceptionReporter] Unknown column 'this_.lengthUnit' in 'where clause'

Name and version of the database you are using:

Code:

MySQL 5.0

The generated SQL (show_sql=true):

Code:

Hibernate: select this_.id as y0_ from core_course this_ where length IN (?) and this_.lengthUnit IN (?) and this_.degreeType IN (?)

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nordborg

Post subject:

Posted: Thu Sep 04, 2008 2:23 pm

Expert

Joined: Wed Mar 03, 2004 6:35 am
Posts: 1240
Location: Lund, Sweden

Filter definitions should use raw SQL in the condition, not HQL. In you example it should be something like:

Code:

<filter name="courseYearLengthUnitFilter" condition="length_unit IN (:courseYearLengthUnit)"

I guess this also means that parameter types are limited to the Java equivalent of the simple SQL column types.

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