Revert "Временный костыль"

This reverts commit 49c182a591.

ConfectioneryDatabaseImplement/Shop.cs

@@ -106,16 +106,12 @@ namespace ConfectioneryDatabaseImplement.Models
                 }
             }
             var shop = context.Shops.First(x => x.Id == model.Id);
-			foreach (var pc in model.Pastries)
-			{
-				context.PastryComponents.Add(new()
-				{
-					Pastry = context.Pastries.First(y => y.Id == pc.Key),
-					Count = pc.Value.Item2,
-				});
-				context.SaveChanges();
-			}
-			context.SaveChanges();
+            shop.ShopPastries.AddRange(model.Pastries.Select(x => new ShopPastry
+            {
+                Pastry = context.Pastries.First(y => y.Id == x.Key),
+                Count = x.Value.Item2,
+            }).Except(shopPastries ?? new()));
+            context.SaveChanges();
             _cachedPastries = null;
         }
     }