I think this is due to the "dinner.RSVPs.Add(rsvp);" line where you actually fill the EntitySet.
The DataContext.SetEntitySetQueries() should not run on just inserted entity, since they are yet filled. Tomorrow I'll try to fix this... Giacomo On Fri, May 8, 2009 at 4:59 AM, Jonathan Pryor <[email protected]> wrote: > Still continuing with my "NerdDinner on Mono" effort, and hitting the > following issue: > > When I attempt to add a new Dinner, NerdDinner effectively does: > > Dinner dinner = new Dinner {...}; > RSVP rsvp = new RSVP(); > rsvp.AttendeeName = User.Identity.Name; > dinner.RSVPs.Add(rsvp); > db.Dinners.InsertOnSubmit(dinner); > db.SubmitChanges(); > > This fails, with: > > System.Reflection.TargetInvocationException: Exception has been thrown by the > target of an invocation. ---> System.InvalidOperationException: The EntitySet > is already loaded and the source cannot be changed. > at System.Data.Linq.EntitySet`1[NerdDinner.Models.RSVP].SetSource > (IEnumerable`1 entitySource) [0x00000] > at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke > (object,object[],System.Exception&) > at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags > invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, > System.Globalization.CultureInfo culture) [0x000ca] in > /home/jon/Development/mono-HEAD/mcs/class/corlib/System.Reflection/MonoMethod.cs:169 > --- End of inner exception stack trace --- > at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags > invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, > System.Globalization.CultureInfo culture) [0x000e5] in > /home/jon/Development/mono-HEAD/mcs/class/corlib/System.Reflection/MonoMethod.cs:179 > at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] > parameters) [0x00000] in > /home/jon/Development/mono-HEAD/mcs/class/corlib/System.Reflection/MethodBase.cs:111 > at System.Data.Linq.DataContext.SetEntitySetsQueries (System.Object entity) > [0x00173] in > /home/jon/Development/mono-HEAD/mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/DataContext.cs:608 > at System.Data.Linq.DataContext._GetOrRegisterEntity (System.Object entity) > [0x00015] in > /home/jon/Development/mono-HEAD/mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/DataContext.cs:468 > at System.Data.Linq.DataContext.Register (System.Object entity) [0x0000d] > in > /home/jon/Development/mono-HEAD/mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/DataContext.cs:675 > at System.Data.Linq.DataContext.SubmitChanges (ConflictMode failureMode) > [0x000a6] in > /home/jon/Development/mono-HEAD/mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/DataContext.cs:378 > at System.Data.Linq.DataContext.SubmitChanges () [0x00000] in > /home/jon/Development/mono-HEAD/mcs/class/System.Data.Linq/src/DbLinq/Data/Linq/DataContext.cs:339 > at NerdDinner.Models.DinnerRepository.Save () [0x00000] > at NerdDinner.Controllers.DinnersController.Create > (NerdDinner.Models.Dinner dinner) [0x00000] > > Suffice it to say, this doesn't happen under .NET's System.Data.Linq. I'm > wondering if anyone has seen a similar error to this before, and/or knows > what an appropriate fix would be. > > Thanks, > - Jon > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "DbLinq" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/dblinq?hl=en -~----------~----~----~----~------~----~------~--~---
