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I'm trying to create a general search facility via the Criteria and Example API, and when trying to create an sub Example that contains only a PK, it is not used when quering.

I have a business object BO1 which has a association with a BO2.
I start creating a Criteria object by adding an exampleof BO1, and linking a SubCriteria where I add the Example of BO1.getBO2().

Here is the code

Code:

DetachedCriteria detachedCriteria =  DetachedCriteria.forClass(BO1.class);
            detachedCriteria.add(Example.create(bo1Filter));
           
            // add the criteria for the related objects.
            if(bo1Filter.getBO2() != null) {                               
                detachedCriteria.createCriteria("bo2").add(Example.create(bo1Filter.getBO2()));
            }

What am I doing wrong?

It seems that only the properties are used as part of the where clause and not the Identifier when available.

Any help is welcome.
Kind regards,
Nico