Question

我正在关注documentation for using Identity并尝试注册一个新用户（执行注册操作），但它失败并出现以下错误：

InvalidOperationException：无法为“ApplicationUser”创建DbSet 因为此类型未包含在上下文的模型中。

启动：

services.AddIdentity<ApplicationUser, IdentityRole>(options =>
{
    //password options
    options.Password.RequireDigit = false;
    // ...
})

我正在使用标准的ApplicationUser：

public class ApplicationUser : IdentityUser
{
}

在AccountController中注册操作：

public async Task<IActionResult> Register(RegisterViewModel viewModel)
{
    if (ModelState.IsValid)
    {
        var user = new ApplicationUser { UserName = viewModel.UserName, Email = viewModel.Email };
        var result = await _userManager.CreateAsync(user, viewModel.Password); //<-- Exception happens here
        if (result.Succeeded)
        {
            await _signInManager.SignInAsync(user, isPersistent: false);
            _logger.LogInformation(3, "User created a new account with password.");
            return RedirectToAction(nameof(HomeController.Index), "Home");
        }

        string errorData = "";
        foreach (var error in result.Errors)
        {
            errorData += error.Description + '\n';
        }
        StoreErrorMessage("Failed to create the user!", errorData);
    }

    return View(viewModel);
}

我已经尝试了以下内容：

将DbSet<ApplicationUser>添加到AplicationContext
我确实通过dotnet ef

Answer 1

我发现了问题。我的ApplicationContext继承自DbContext。我将其更改为IdentityDbContext<ApplicationUser>并且确实有效。

Answer 2

创建继承IdentityDbContext的新上下文类。

public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        // Customize the ASP.NET Identity model and override the defaults if needed.
        // For example, you can rename the ASP.NET Identity table names and more.
        // Add your customizations after calling base.OnModelCreating(builder);
    }
}

并在startup.cs文件中添加以下代码

services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(connection));

这将有助于您实现数据库优先。

使用ASP .NET Core Identity和EntityFrameworkCore注册新用户时出现InvalidOperationException

2 个答案: