ef-code-first - 如何使用 Identity ASP.NET Core 通过代码优先迁移为用户和角色设定种子

Question

我创建了一个新的干净的 asp.net 5 项目 (rc1-final)。使用身份验证，我只拥有带有以下代码的 ApplicationDbContext.cs:

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    protected override void OnModelCreating(ModelBuilder builder)
    {
        // On event model creating
        base.OnModelCreating(builder);
    }
}

请注意 ApplicationDbContext 使用 IdentityDbContext 而不是 DbContext。

有任何 IdentityConfig.cs。如果它不存在，我需要在哪里放置经典的 protected 覆盖​​无效种子来创建角色和用户？

Answer 1

我这样做的方法是在模型命名空间中创建一个类。

public class SampleData
{
    public static void Initialize(IServiceProvider serviceProvider)
    {
        var context = serviceProvider.GetService<ApplicationDbContext>();

        string[] roles = new string[] { "Owner", "Administrator", "Manager", "Editor", "Buyer", "Business", "Seller", "Subscriber" };

        foreach (string role in roles)
        {
            var roleStore = new RoleStore<IdentityRole>(context);

            if (!context.Roles.Any(r => r.Name == role))
            {
                roleStore.CreateAsync(new IdentityRole(role));
            }
        }


        var user = new ApplicationUser
        {
            FirstName = "XXXX",
            LastName = "XXXX",
            Email = "xxxx@example.com",
            NormalizedEmail = "XXXX@EXAMPLE.COM",
            UserName = "Owner",
            NormalizedUserName = "OWNER",
            PhoneNumber = "+111111111111",
            EmailConfirmed = true,
            PhoneNumberConfirmed = true,
            SecurityStamp = Guid.NewGuid().ToString("D")
        };


        if (!context.Users.Any(u => u.UserName == user.UserName))
        {
            var password = new PasswordHasher<ApplicationUser>();
            var hashed = password.HashPassword(user,"secret");
            user.PasswordHash = hashed;

            var userStore = new UserStore<ApplicationUser>(context);
            var result = userStore.CreateAsync(user);

        }

        AssignRoles(serviceProvider, user.Email, roles);

        context.SaveChangesAsync();
    }

    public static async Task<IdentityResult> AssignRoles(IServiceProvider services, string email, string[] roles)
    {
        UserManager<ApplicationUser> _userManager = services.GetService<UserManager<ApplicationUser>>();
        ApplicationUser user = await _userManager.FindByEmailAsync(email);
        var result = await _userManager.AddToRolesAsync(user, roles);

        return result;
    }

}

在启动时运行此代码。在路由配置之后的配置方法末尾的 Startup.cs 中，添加以下代码，如斯塔福德威廉姆斯之前所说。

SampleData.Initialize(app.ApplicationServices);