EF Issue 2057

MyContext.cs

using Microsoft.Data.Entity;

namespace ConsoleApp1
{
    public class MyContext : DbContext
    {
        public DbSet<Address> Addresses { get; set; }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            optionsBuilder.UseSqlServer(@"Server=(localdb)\MSSqlLocalDb;Database=scratch-91");
        }
    }
}

Program.cs

using System;
using System.Diagnostics;
using System.Linq;
using Microsoft.Framework.DependencyInjection;
using Microsoft.Framework.Logging;

namespace ConsoleApp1
{
    public class Program
    {
        public void Main(string[] args)
        {
            var logger = new SimpleLoggerFactory();

            var serviceCollection = new ServiceCollection();
            serviceCollection
                .AddInstance<ILoggerFactory>(logger)
                .AddEntityFramework()
                .AddSqlServer()
                .AddDbContext<MyContext>();

            var provider = serviceCollection.BuildServiceProvider();

            using (var _db = provider.GetService<MyContext>())
            {
//                _db.Database.AsRelational().EnsureCreated();
                _db.Addresses.Where(x => x.Discriminator == Discriminator.Something).ToList();
            }
            var sql = logger.Instance.Sb.ToString();
            Console.WriteLine(sql);
            Debug.Assert(sql.Contains("@__p_0: 1"));
            Console.ReadLine();
        }
    }

    public class Address
    {
        public int Id { get; set; }
        public Discriminator Discriminator { get; set; }
    }

    public enum Discriminator
    {
        Something = 1
    }
}

project.json

{
  "version": "1.0.0-*",
  "description": "",
  "authors": [ "" ],
  "tags": [ "" ],
  "projectUrl": "",
  "licenseUrl": "",

  "dependencies": {
    "EntityFramework.SqlServer": "7.0.0-*"
  },

  "commands": {
    "ConsoleApp1" : "ConsoleApp1"
  },

  "frameworks" : {
    "dnx451": { },
    "dnxcore50" : {
      "dependencies": {
        "System.Console": "4.0.0-*",
        "System.Collections": "4.0.10-*",
        "System.Linq": "4.0.0-*",
        "System.Threading": "4.0.10-*",
        "Microsoft.CSharp": "4.0.0-*"
      }
    }
  }
}

SimpleLoggerFactory.cs

using System;
using System.Text;
using Microsoft.Framework.Logging;

namespace ConsoleApp1
{
    public class SimpleLoggerFactory : ILoggerFactory
    {
        public SimpleLogger Instance { get; } = new SimpleLogger();

        public ILogger CreateLogger(string categoryName)
        {
            return Instance;
        }

        public void AddProvider(ILoggerProvider provider)
        {
        }

        public LogLevel MinimumLevel { get; set; }

        public class SimpleLogger : ILogger
        {
            public StringBuilder Sb { get; } = new StringBuilder();

            public void Log(LogLevel logLevel, int eventId, object state, Exception exception,
                Func<object, Exception, string> formatter)
            {
                if (formatter == null || eventId != 42)
                    return;
                Sb.AppendLine(formatter(state, exception));
            }

            public bool IsEnabled(LogLevel logLevel) => true;

            public IDisposable BeginScopeImpl(object state)
            {
                return new NullScope();
            }

            public class NullScope : IDisposable
            {
                public void Dispose()
                {
                }
            }
        }
    }
}