Question

In Grails 2, we all know that a where clause creates a DetachedCriteria. Also, one can set the fetchMode property of a relationship when creating a normal Criteria query. But, if I’m creating a where-clause query, how do I set the fetchMode property of the underlying Criteria?

Does not work:

MyDomainClass.where {
  foo == 'bar'
  fetchMode "reference", FetchMode.EAGER
}

works, but uses old Criteria style, not where clause:

MyDomainClass.withCriteria {
  eq "foo", "bar"
  fetchMode "reference", FetchMode.EAGER
}

Please don’t tell me to set the fetch mode to eager in the domain class mapping. I know about that, and need to control the eager fetching at the query level. Thanks!

Answer 1

This isn’t supported yet, so please create a feature request at http://jira.grails.org/browse/GRAILS

There is a somewhat hackish workaround though by accessing the Hibernate Criteria instance that does the actual querying:

MyDomainClass.where {
   foo == 'bar'
}.withPopulatedQuery(null, null) { query ->
   [e-mail]('reference', FetchMode.EAGER)
   query.list()
}