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
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