Временный костыль

ConfectioneryDatabaseImplement/Shop.cs

@@ -106,12 +106,16 @@ namespace ConfectioneryDatabaseImplement.Models
                 }
             }
             var shop = context.Shops.First(x => x.Id == model.Id);
-            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();
+			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();
             _cachedPastries = null;
         }
     }