entity-framework - Web API展開エラー「オブジェクト」には「インクルード」の定義が含まれていません

Question

これは私のモデルです:

エクササイズ：

 public class Exercise
    {


        public int ExerciseId { get; set; }

        public string Name { get; set; }

        public string Description { get; set; }
}

筋：

public class Muscle
    {


        public int MuscleId { get; set; }

        public string Name { get; set; }
}

エクササイズと筋肉

public class ExercisesAndMuscles { #region プロパティ

    public int Id { get; set; }

    //each exercise hits muslce by some percentage
    public int PercentageByWhichMuscleIsHit { get; set; }

    #endregion

    #region Navigational properties

    public int MuscleId { get; set; }
    public virtual Muscle Muscle { get; set; }


    public int ExerciseId { get; set; }
    public virtual Exercise Exercise { get; set; }

    #endregion
}

FluentApi の構成は次のとおりです。

modelBuilder.Entity<ExercisesAndMuscles>()
                .HasRequired(e => e.Exercise)
                .WithMany()
                .HasForeignKey(e => e.ExerciseId)
                .WillCascadeOnDelete(false);

            modelBuilder.Entity<ExercisesAndMuscles>()
                .HasRequired(m => m.Muscle)
                .WithMany()
                .HasForeignKey(m => m.MuscleId)
                .WillCascadeOnDelete(false);

これらの2行をTestDatabaseContextに追加しました

Configuration.LazyLoadingEnabled = false;
Configuration.ProxyCreationEnabled = false;

これが私のWebApiです

public class ExerciseAndMuscleController : ApiController
    {
        readonly TestDatabaseContext _databaseContext = new TestDatabaseContext ();
        // GET api/<controller>
        public IQueryable<ExercisesAndMuscles> Get()
        {
            return _databaseContext.ExercisesAndMuscleses.Include( m => m.Exercise).AsQueryable();
        }
}

そして、次のようにクエリを実行しようとすると:

http://localhost:23758/api/ExerciseAndMuscle?$expand=Exercise

次のエラーが表示されます。

{"$id":"1","$type":"System.Web.Http.HttpError, System.Web.Http","Message":"An error has occurred.","ExceptionMessage":"'object' does not contain a definition for 'Include'","ExceptionType":"Microsoft.CSharp.RuntimeBinder.RuntimeBinderException","StackTrace":"   at System.Web.Http.ApiController.<InvokeActionWithExceptionFilters>d__b.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()\r\n   at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__0.MoveNext()"}

インクルードなしのエラーと遅延読み込みが有効な場合は同じです。