使用VS2017内置的模板进行Core 2 MVC和身份验证。尝试使用用户和角色为数据库设定种子。角色运作良好，他们种子。用户总是返回一个错误，说“不能为空”，我认为是因为初始化函数末尾的这一行实际上找不到用户
await _userManager.AddToRoleAsync(await _userManager.FindByNameAsync(user), "Administrator");
我用这篇文章来构建它： https://gist.github.com/mombrea/9a49716841254ab1d2dabd49144ec092
注意 - 这篇文章是针对Core 1.0的，我使用的是Core 2.0，这可能就是我遇到问题的原因。
如前所述，我可以播种角色，但用户并没有创建自己。一旦我想到这一点，我将尝试多个用户，我已经做了一个测试创建多个角色。
这是初始化类
//Taken from :
//https://gist.github.com/mombrea/9a49716841254ab1d2dabd49144ec092
public interface IdentityDBIitializer
{
void Initialize();
}
public class LatestUserDBInitializer : IdentityDBIitializer
{
private readonly ApplicationDbContext _context;
private readonly UserManager<ApplicationUser> _userManager;
private readonly RoleManager<IdentityRole> _roleManager;
public LatestUserDBInitializer(
ApplicationDbContext context,
UserManager<ApplicationUser> userManager,
RoleManager<IdentityRole> roleManager)
{
_context = context;
_userManager = userManager;
_roleManager = roleManager;
}
//This example just creates an Administrator role and one Admin users
public async void Initialize()
{
//create database schema if none exists
_context.Database.EnsureCreated();
//If there is already an Administrator role, abort
//if (_context.Roles.Any(r => r.Name == "Administrator")) return;
//Create the Administartor Role
//await _roleManager.CreateAsync(new IdentityRole("Administrator"));
//Create the default Admin account and apply the Administrator role
string user = "me@myemail.com";
string password = "z0mgchangethis";
await _userManager.CreateAsync(new ApplicationUser { UserName = user, Email = user, EmailConfirmed = true }, password);
await _userManager.AddToRoleAsync(await _userManager.FindByNameAsync(user), "Administrator");
}
}
这是我的STartup：
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<POSContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("UKFest2018Context")));
services.AddDbContext<ApplicationDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("UKFestIdentityContext")));
services.AddIdentity<ApplicationUser, IdentityRole>()
.AddEntityFrameworkStores<ApplicationDbContext>()
.AddDefaultTokenProviders();
// Add Database Initializer
services.AddScoped<IdentityDBIitializer, LatestUserDBInitializer>();
// Add application services.
services.AddTransient<IEmailSender, EmailSender>();
services.AddMvc();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, IdentityDBIitializer dBInitializer)
{
if (env.IsDevelopment())
{
app.UseBrowserLink();
app.UseDeveloperExceptionPage();
app.UseDatabaseErrorPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseAuthentication();
//Seeds Identity DB
dBInitializer.Initialize();
//UserRoleInitializer.InitializeUsersAndRoles(app.ApplicationServices);
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
}
答案 0 :(得分：1)
对于您的问题，原因是您的密码无效导致创建用户失败。然后，await _userManager.FindByNameAsync(user)将返回null而不是预期的User。
您可以尝试使用密码，例如 1qaz @ WSX 。
您可以参考enter link description here查找默认要求。
答案 1 :(得分：0)
这可能意味着凭据不符合您的配置。或者，就我而言，我必须通过IServiceProvider获取dbcontext和管理器。
您可以在配置（...）
结束时执行此操作// Data seeding
await Data.DataSeeder.SeedDatabase(app.ApplicationServices.GetRequiredService<IServiceScopeFactory>().CreateScope());
有一个数据播种器类使用IServiceScope来连接依赖项，poof
public class DataSeeder
{
public static async Task SeedDatabase(IServiceScope scope)
{
try
{
CounterDbContext context = scope.ServiceProvider.GetService<CounterDbContext>();
CustoUserManager userManager = scope.ServiceProvider.GetRequiredService<CustoUserManager>();
CustoRoleManager roleManager = scope.ServiceProvider.GetRequiredService<CustoRoleManager>();
// SEED USER CODE HERE
// SEED USER CODE HERE
// SEED USER CODE HERE
// SEED USER CODE HERE
if (!context.CurrencyTypes.Any()) {
string[,] currencyTypes = new string[,] {
{ "Crypto", "CRYPTO" },
{ "Fiat Money", "FIAT" }
};
for (int i = 0; i < currencyTypes.GetLength(0); i++)
{
CurrencyType cType = new CurrencyType()
{
Name = currencyTypes[i, 0],
TypeShortForm = currencyTypes[i, 1],
};
context.CurrencyTypes.Add(cType);
}
context.SaveChanges(firstUser.Id);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
这可能很乱......上面是播种类吧？以下是您为用户执行此操作的方法。
#if DEBUG
string[] CreateUsers = { "nixholas"};
string[] CreateNames = { "Nicholas" };
string[] CreateEmails = { "xxx@xxxx.co" };
string defaultPassword = "P@ssw0rd";
// Seed the roles first
// https://stackoverflow.com/questions/34343599/how-to-seed-users-and-roles-with-code-first-migration-using-identity-asp-net-mvc
if (!roleManager.Roles.Any())
{
foreach (UserRoleType role in Enum.GetValues(typeof(UserRoleType)))
{
var newRole = new Role();
newRole.Name = role.ToString();
await roleManager.CreateAsync(newRole);
}
}
if (await userManager.FindByEmailAsync(CreateEmails[0]) == null)
{
for (int i = 0; i < CreateUsers.Length; i++)
{
User user = new User
{
Email = CreateEmails[i],
UserName = CreateUsers[i],
Name = CreateNames[i]
};
await userManager.CreateAsync(user, defaultPassword);
// Setup
await userManager.UpdateSecurityStampAsync(user);
user.NormalizedUserName = user.UserName;
user.NormalizedEmail = user.Email;
await userManager.UpdateNormalizedUserNameAsync(user);
await userManager.UpdateNormalizedEmailAsync(user);
await userManager.UpdateAsync(user);
// Email Automated Setup
var token = await userManager.GenerateEmailConfirmationTokenAsync(user);
await userManager.ConfirmEmailAsync(user, token);
await userManager.AddToRoleAsync(user, "Owner");
}
}