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。