NullReferenceException after the "Add IMutableModel API" changes

[Jetski5822]

Latest cut of the code seems to be throwing a null ref exception in Remove.

Invoking handler threw error.                                                                                                                                                                
System.NullReferenceException: Object reference not set to an instance of an object.                                                                                                         
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Remove(EntityType entityType, ConfigurationSource configurationSource)                                                    
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.Ignore(EntityType entityType, String name, ConfigurationSource configurationSource)                                       
   at Microsoft.Data.Entity.Metadata.Internal.InternalModelBuilder.RemoveEntityTypesUnreachableByNavigations(ConfigurationSource configurationSource)                                        
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ModelCleanupConvention.Apply(InternalModelBuilder modelBuilder)                                                                    
   at Microsoft.Data.Entity.Metadata.Conventions.Internal.ConventionDispatcher.OnModelBuilt(InternalModelBuilder modelBuilder)                                                               
   at Microsoft.Data.Entity.ModelBuilder.Validate()                                                                                                                                          
   at Microsoft.Data.Entity.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)                                 
   at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)                                                                                           
   at Microsoft.Data.Entity.Internal.DbContextServices.CreateModel()                                                                                                                         
   at Microsoft.Data.Entity.Internal.LazyRef`1.get_Value()                                                                                                                                   
   at Microsoft.Data.Entity.Internal.DbContextServices.get_Model()                                                                                                                           
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetService[T](IServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ClosedIEnumerableService.CallSite.Invoke(ServiceProvider provider)                                                              
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.TransientCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)                                                     
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService[T](IServiceProvider provider)                                                                    
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ConstructorCallSite.Invoke(ServiceProvider provider)                                                                            
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.ScopedCallSite.Invoke(ServiceProvider provider)                                                                               
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)                                                     
   at Microsoft.Extensions.DependencyInjection.ServiceProviderExtensions.GetRequiredService[T](IServiceProvider provider)                                                                    
   at Microsoft.Data.Entity.Internal.InternalDbSet`1.<.ctor>b__2_0()                                                                                                                         
   at Microsoft.Data.Entity.Internal.LazyRef`1.get_Value()                                                                                                                                   
   at Microsoft.Data.Entity.Internal.InternalDbSet`1.System.Linq.IQueryable.get_Provider()                                                                                                   
   at System.Linq.Queryable.Any[TSource](IQueryable`1 source, Expression`1 predicate)                                                                                                        
   at Orchard.Data.EntityFramework.EFContentQueryStore.Query[TDocument](Expression`1 map) in D:\Brochard\src\Orchard.Web\Modules\Orchard.Data.EntityFramework\Indexing\EFContentQueryStore.cs

[rowanmiller]

@Jetski5822 can you provide some code for us to reproduce the issue you are seeing?

[Jetski5822]

Hey @rowanmiller I will try to see if I can create a small repo for you... though it might be difficult to pull out of the Orchard code base.

What I can say is that it is using a InMemory database... and is storing and reading in the same request. The DataContext is per-request too.

[rowanmiller]

Closing as we have not heard back with a repro. Feel free to reopen if you are able to provide it.