grails use order on createcriteria

Question

I try to use CreateCriteria to fetch some ids. Since ListDistinct not support pagination, I found a solution in the web to resolve this issue. http://ondrej-kvasnovsky.blogspot.fr/2012/01/grails-listdistinct-and-pagination.html

But I when I tried to fetch elements with sort and order I had an exception:

"Order by expression "THIS_.DATE" must be in the result list in this case; SQL statement:..."

My code:

class MyClassA {

Date date
static hasMany =  [userList:User]

}


class User {

   String login

}



class ResponseService {

  def load(offset, max ) {

    def idList =  MyClassA.createCriteria().list (max: max, offset: offset) {
      projections { distinct ( "id" ) }
      userList{ 
      eq("login","toto") 

  }
      order("date","desc")
   }

  if( idList ) { 

  // fetch all Responses based on selected IDs
   def results =  MyClassA.getAll( idList )
   return results
    }

  } 
}

Answer 1

The probem probably is that in your result there is no date column. I haven't tested it but after looking on this question: What is the sql query for this? (comment to first answer) I think that adding

property("date")

to your projections can help.

---------------- EDIT ----------------------------

Here is full ResponseService class for your problem. I've added also property("id") to your projections clause.

class ResponseService {

    def load(offset, max ) {

        def idList =  MyClassA.createCriteria().list (max: max, offset: offset) {
            projections { 
                distinct ( "id" ) 
                property("date")
                property("id")
            }
            userList{ 
                eq("login","toto") 
            }
            order("date","desc")
        }

        if( idList ) { 

            // fetch all Responses based on selected IDs
            def results =  MyClassA.getAll( idList )
            return results
        }

    } 
}