Changes in EF Core 1.1 break Npgsql 1.0 provider

[divega]

Steps to reproduce

1. Create a new console app
2. Execute install-package Microsoft.Entityframeworkcore.Relational -pre form recent 1.1.0 feed
3. Execute install-package Npgsql.EntityFrameworkCore.PostgreSQL from NuGet.org feed
4. Create a simple model and app, e.g.:

using Microsoft.EntityFrameworkCore;

namespace TestPostgreSQL
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var context = new MyContext())
            {
                context.Database.EnsureCreated();
            }
        }
    }

    public class MyContext :DbContext
    {
        public DbSet<Person> People { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseNpgsql("Server = localhost; Username = dummy; Password = dummy;Database=dummy");
        }
    }

    public class Person
    {
        public int Id { get; set; }
    }
}

The issue

The line that calls context.Database.EnsureCreated() throws

System.MissingMethodException was unhandled
  HResult=-2146233069
  Message=Method not found: 'Microsoft.EntityFrameworkCore.Metadata.IEntityType Microsoft.EntityFrameworkCore.Metadata.IPropertyBase.get_DeclaringEntityType()'.
  Source=Npgsql.EntityFrameworkCore.PostgreSQL
  StackTrace:
       at Microsoft.EntityFrameworkCore.Internal.NpgsqlModelValidator.EnsureUuidExtensionIfNeeded(IModel model)
       at Microsoft.EntityFrameworkCore.Internal.NpgsqlModelValidator.Validate(IModel model)
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.<>c__DisplayClass14_0.<GetModel>b__0(Object k)
       at System.Collections.Concurrent.ConcurrentDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
       at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
       at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
       at Microsoft.EntityFrameworkCore.Internal.LazyRef`1.get_Value()
       at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
       at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServiceCollectionExtensions.<>c.<AddEntityFramework>b__0_6(IServiceProvider p)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactoryService(FactoryService factoryService, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass16_0.<RealizeService>b__0(ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
       at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
       at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
       at Microsoft.EntityFrameworkCore.Storage.DatabaseProviderServices.GetService[TService]()
       at Microsoft.EntityFrameworkCore.Storage.Internal.NpgsqlDatabaseProviderServices.get_Creator()
       at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServiceCollectionExtensions.<>c.<AddEntityFramework>b__0_13(IServiceProvider p)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactoryService(FactoryService factoryService, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument)
       at Microsoft.Extensions.DependencyInjection.ServiceProvider.<>c__DisplayClass16_0.<RealizeService>b__0(ServiceProvider provider)
       at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
       at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[T](IServiceProvider provider)
       at Microsoft.EntityFrameworkCore.Infrastructure.AccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
       at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.get_DatabaseCreator()
       at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.EnsureCreated()
       at TestPostgreSQL.Program.Main(String[] args) in c:\users\divega\documents\visual studio 2015\Projects\TestPostgreSQL\TestPostgreSQL\Program.cs:line 11
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

Further technical details

EF Core version: id=1.1.0-alpha1-22402
Operating system: Windows 10 1607
Visual Studio version: VS 2015 Update 3

[divega]

Note for triage: I am not entirely surprised by this. I think we just need to decide explicitly if EF Core 1.1 will require new provider versions to work.

[rowanmiller]

I am not entirely surprised by this. I think we just need to decide explicitly if EF Core 1.1 will require new provider versions to work.

We've been explicitly making changes so that providers do not need to recompile. So we should fix this.

[divega]

Sounds good to me.

[divega]

We discussed this with @rowanmiller and @ajcvickers and we will aim for binary compatibility for providers.