reference selector constraint

I want to use a reference selector with a selection page. In the selection page I use a simple data grid with database as source and an Xpath constraint with a boolean attribute of true. But when I run the application the selection page does not apply the constraint, instead it shows all entries in the table. If I use a drop down list with the same constraint it does get applied. I have traced the SQL query and do not see the constraint in the query. Is this a bug or om I doing something wrong.
1 answers

You need to set the constraint on the reference selector itself instead of the select page.