EntitySet.Where(myPredicate) throws NotSupportedException

Question

EDIT: Let\'s try this again. This time I\'ve used the AdventureWorks sample database so you can all play along. This will rule out anything crazy I\'ve do

Answer 1

Try this:

Expression> activePlanPredicate = plan => plan.CancelDate == null && plan.UpgradeDate == null;
var result = from subAccount in db.SubAccounts
         select new ServiceTicket
         {
             MaintenancePlans = subAccount.Maintenances.Where(activePlanPredicate).Select(plan => plan.ToString()).ToArray()
             // Set other properties...
         };

I don't have VisualStudio in front of me, so that may require some tweaking. The issue you're running into is that you want to access the IQueryable extension of Where, but just having a Func gives you the IEnumerable extension.