I'm sure this is probably an easy one but I've tried my first code sample using Fluidity and decide to make it harder for myself and swap out the int Id (from the getting started doc) to a uniqueidentifier.

I used this to set the Guid but I keep getting an error thrown, as below.

                                tabConfig.AddField(p => p.Id).MakeReadonly().SetDefaultValue(Guid.NewGuid);

Also haven't been able to get there yet but not sure this will work for editing as well as updating e.g. need to add a if (p.Id != null)

System.NullReferenceException: Object reference not set to an instance of an object.

at Fluidity.Web.Trees.FluidityTreeController.GetTreeNode(String id, FormDataCollection queryStrings) at lambdamethod(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>cDisplayClass10.9(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ApiControllerActionInvoker._1.MoveNext()

Also this is the url that get's set after Save which looks a bit weird: http://localhost:85/umbraco/#/database/fluidity/edit/location!00000000-0000-0000-0000-000000000000