Initial state

samples/angular/MusicStore/Apis/GenresApiController.cs

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+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNet.Mvc;
+using Microsoft.Data.Entity;
+using MusicStore.Models;
+using MusicStore.Infrastructure;
+
+namespace MusicStore.Apis
+{
+    [Route("api/genres")]
+    public class GenresApiController : Controller
+    {
+        private readonly MusicStoreContext _storeContext;
+
+        public GenresApiController(MusicStoreContext storeContext)
+        {
+            _storeContext = storeContext;
+        }
+
+        [HttpGet]
+        public async Task<ActionResult> GenreList()
+        {
+            var genres = await _storeContext.Genres
+                //.Include(g => g.Albums)
+                .OrderBy(g => g.Name)
+                .ToListAsync();
+
+            return Json(genres);
+        }
+
+        [HttpGet("genre-lookup")]
+        public async Task<ActionResult> Lookup()
+        {
+            var genres = await _storeContext.Genres
+                .Select(g => new { g.GenreId, g.Name })
+                .ToListAsync();
+
+            return Json(genres);
+        }
+
+        [HttpGet("menu")]
+        public async Task<ActionResult> GenreMenuList(int count = 9)
+        {
+            count = count > 0 && count < 20 ? count : 9;
+
+            var genres = await _storeContext.Genres
+                .OrderByDescending(g =>
+                    g.Albums.Sum(a =>
+                        a.OrderDetails.Sum(od => od.Quantity)))
+                .Take(count)
+                .ToListAsync();
+
+            return Json(genres);
+        }
+
+        [HttpGet("{genreId:int}/albums")]
+        [NoCache]
+        public async Task<ActionResult> GenreAlbums(int genreId)
+        {
+            var albums = await _storeContext.Albums
+                .Where(a => a.GenreId == genreId)
+                //.Include(a => a.Genre)
+                //.Include(a => a.Artist)
+                //.OrderBy(a => a.Genre.Name)
+                .ToListAsync();
+
+            return Json(albums);
+        }
+    }
+}