shopping-cart-blazor-wasm/Server/Data/Database.cs

using System.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using ShoppingCartStarter.Server.DomainModels;

namespace ShoppingCartStarter.Server.Data
{
    public class Database
    {
        /// <summary>
        /// Seed dummy cart data
        /// </summary>
        public static void InitialiseDatabase(IApplicationBuilder app, IWebHostEnvironment env)
        {
            using var serviceScope = app.ApplicationServices.GetService<IServiceScopeFactory>().CreateScope();
            using var context = serviceScope.ServiceProvider.GetRequiredService<StoreContext>();
            
            context.Database.Migrate();

            ShoppingCart cart;
            if (context.Carts.Any())
            {
                cart = context.Carts
                    .Include(x=>x.LineItems)
                    .FirstOrDefault();
            }
            else
            {
                cart = new ShoppingCart();
                context.Carts.Add(cart);
            }

            if (cart?.LineItems.Count == 0)
            {
                cart.LineItems.AddRange(new[]
                {
                    new LineItem {Image = "test-image.jpg", Name = "Big T-shirt", Price = 39.50m, Quantity = 2},
                    new LineItem {Image = "test-image.jpg", Name = "Small White T-shirt", Price = 19.50m, Quantity = 1},
                    new LineItem {Image = "test-image.jpg", Name = "Smart Speaker", Price = 23.00m, Quantity = 1},
                    new LineItem {Image = "test-image.jpg", Name = "Dumb Speaker", Price = 99.00m, Quantity = 3},
                    new LineItem {Image = "test-image.jpg", Name = "Giraffe Poster", Price = 9.00m, Quantity = 20}
                });
            }

            context.SaveChanges();
        }
    }
}