Custom model binder in EF do not load child entities in Async

Question

I'm using Entity Framework 6.1.1 and when I use a custom model binder in an async call it throw me an exception because the child entity (Brand) is not loaded and mandatory. I'm using ninject, I updated to the latest version ( 3.2.2.0) Here's the code :

public class PlayerModelBinder : DefaultModelBinder
    {
        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            var context = DependencyResolver.Current.GetService<DbContext>();
            var id = ModelBinderHelpers.GetA<Guid>(bindingContext, "id");

            if (id == null || !id.HasValue)
                throw new HttpException(404, "Not found");

            var entity = context.Set<Player>().Find(id);

            if (entity == null)
                throw new HttpException(404, "Not found");

            return entity;
        }
    }

This will work :

public ActionResult Deactivate(Player player)
        {
            try
            {
                player.Deactivate();
                DbContext.SaveChanges();
            }
            catch (Exception ex)
            {
                var b = ex;
            }
            FlashBag.AddMessage(
                FlashType.Success,
                Strings.Player_DeactivatedSuccessfully);

            return RedirectToAction("Index");
        }

But this does not work :

public async Task<ActionResult> Deactivate(Player player)
        {
            try
            {
                player.Deactivate();
                await DbContext.SaveChangesAsync();
            }
            catch (Exception ex)
            {
                var b = ex;
            }
            FlashBag.AddMessage(
                FlashType.Success,
                Strings.Player_DeactivatedSuccessfully);

            return RedirectToAction("Index");
        }

Thanks for the help!

score 0 · Accepted Answer · edited May 23 '17 at 12:15

After reading this post

I ended up doing this :

public class PlayerModelBinder : DefaultModelBinder
    {
        public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
        {
            var context = DependencyResolver.Current.GetService<DbContext>();
            var id = ModelBinderHelpers.GetA<Guid>(bindingContext, "id");

            if (id == null || !id.HasValue)
                throw new HttpException(404, "Not found");

            var entity = context.Set<Player>()
                .Include(x => x.Brand)
                .FirstOrDefault(x => x.Id == id);

            if (entity == null)
                throw new HttpException(404, "Not found");

            return entity;
        }
    }

Custom model binder in EF do not load child entities in Async

1 Answers1