为什么我的 UpdateAsync(user) 方法第一次失败，声称用户不存在？

Question

如果 viewModel 与 user 对象不同，我有一个方法可以让用户登录并尝试更新用户。我看到的行为令人困惑。

每次执行该方法时，如果 user 之前未登录，行 await _userManager.UpdateAsync(user); 会失败并出现异常："There is no user with id: 99"（或任何 id 值).但是，如果 user 是之前登录的，则该行有效。

例如，

用户启动应用程序（当前未登录）并单击按钮 post viewModel 到服务器。
应用程序登录 user，
如果 viewModel 与现有 user 的数据不同，服务器会尝试更新它。
此更新将失败 "There is no user with id: 99"
用户再次单击按钮，post将相同的数据发送到服务器。（这次user已经从之前失败的post登录了）
viewModel还是和现有数据不一样（记住，上次更新失败了）
await _userManager.UpdateAsync(user); 有效，记录已更新。

方法如下：

[UnitOfWork]
public async Task<AjaxResponse> Post(MyViewModel viewModel)
{
    try
    {
        var loginResult = await _userManager.LoginAsync(viewModel.UserName, viewModel.Password, viewModel.TenancyName);

        User user;
        if (loginResult.Result == AbpLoginResultType.Success)
        {
            await SignInAsync(loginResult.User, loginResult.Identity);

            user = loginResult.User;

            if (user.AccessToken != viewModel.AccessToken)
            {
                user.AccessToken = viewModel.AccessToken;

                // why does this fail the first time?
                await _userManager.UpdateAsync(user);
            }
        }
        else 
        { 
            /* do some other UnitOfWork stuff below */
        }


        return new AjaxResponse(new MyResult
        {
            Name = user.Name + " " + user.Surname,
            UserName = user.UserName,
            EmailAddress = user.EmailAddress,
            IsActive = user.IsActive,
            Success = true,
            UserId = user.UserId,
        });
    }
    catch (Exception ex)
    {
        throw new HttpException((int)HttpStatusCode.InternalServerError, ex.Message);
    }
}

我可以确认 ID 为 99 的用户确实存在于数据库中。

备案，以下为ex.StackTrace

内容

   at Abp.Authorization.Users.AbpUserManager`3.<GetUserByIdAsync>d__5b.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Abp.Authorization.Users.AbpUserManager`3.<UpdateAsync>d__64.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at MyProject.Web.Controllers.Api.AccountApiController.<Post>d__16.MoveNext() in C:\dev\MyProject\MyProject.Web\Controllers\Api\AccountApiController.cs:line 146

我认为一个线索可能在更新前执行的以下查询（被 SQL Server Profiler 拦截）中：

exec sp_executesql N'SELECT TOP (1) 
    [Extent1].[Id] AS [Id], 
    [Extent1].[AccessToken] AS [AccessToken], 
    [Extent1].[UserId] AS [UserId], 
    [Extent1].[EmailAddress] AS [EmailAddress], 
    [Extent1].[TenantId] AS [TenantId], 
    [Extent1].[IsDeleted] AS [IsDeleted], 
    -- irrelevant stuff removed
    FROM [dbo].[AbpUsers] AS [Extent1]
    WHERE 
            ((([Extent1].[TenantId] IS NULL) AND (@DynamicFilterParam_1 IS NULL)) 
        OR  (([Extent1].[TenantId] IS NOT NULL) AND ([Extent1].[TenantId] = @DynamicFilterParam_1)) 
        OR (@DynamicFilterParam_2 IS NOT NULL)) AND (([Extent1].[IsDeleted] = @DynamicFilterParam_3) 
        OR (@DynamicFilterParam_4 IS NOT NULL)) AND ([Extent1].[EmailAddress] = @p__linq__0)',
        N'@DynamicFilterParam_1 int,@DynamicFilterParam_2 bit,@DynamicFilterParam_3 bit,@DynamicFilterParam_4 bit,@p__linq__0 nvarchar(4000)'
        ,@DynamicFilterParam_1=NULL,@DynamicFilterParam_2=NULL,@DynamicFilterParam_3=0,@DynamicFilterParam_4=NULL,@p__linq__0=N'myemail@mail.com'

在这里，我们可以看到@DynamicFilterParam_1=NULL。变量 @DynamicFilterParam_1 对应于 [Extent1].[TenantId] 的值。如果我手动分配值 2（这是与数据库中的记录关联的值）而不是 NULL 并重新运行查询，它 returns 我期望的记录。

第二次执行该方法时，可以看到TenantId被正确赋值为2。

为什么TenantId对应的值第一次赋值为NULL？为什么 UpdateAsync 方法每次都失败？我该怎么做才能让它发挥作用？

响应下面的请求，UpdateAsync 的定义在 the asp.net boilerplate github

中可用

Answer 1

这是因为多租户。 ABP 在用户登录之前并不知道 TenantId。您应该手动设置租户 ID 以切换到用户的租户。我的登录码是这样的：

public virtual async Task<JsonResult> Login(LoginViewModel loginModel, string returnUrl = "", string returnUrlHash = "")
{
    var loginResult = await GetLoginResultAsync(loginModel.UsernameOrEmailAddress, loginModel.Password, loginModel.TenancyName);

    var tenantId = loginResult.Tenant == null ? (int?)null : loginResult.Tenant.Id;

    using (UnitOfWorkManager.Current.SetTenantId(tenantId))
    {
        if (loginResult.User.ShouldChangePasswordOnNextLogin)
        {
            loginResult.User.SetNewPasswordResetCode();

            return Json(new AjaxResponse
            {
                TargetUrl = Url.Action(
                    "ResetPassword",
                    new ResetPasswordViewModel
                    {
                        TenantId = tenantId,
                        UserId = SimpleStringCipher.Instance.Encrypt(loginResult.User.Id.ToString()),
                        ResetCode = loginResult.User.PasswordResetCode
                    })
            });
        }

        var signInResult = await _signInManager.SignInOrTwoFactorAsync(loginResult, loginModel.RememberMe);
        if (signInResult == SignInStatus.RequiresVerification)
        {
            return Json(new AjaxResponse
            {
                TargetUrl = Url.Action(
                    "SendSecurityCode",
                    new
                    {
                        returnUrl = returnUrl + (returnUrlHash ?? ""),
                        rememberMe = loginModel.RememberMe
                    })
            });
        }

        Debug.Assert(signInResult == SignInStatus.Success);

        await UnitOfWorkManager.Current.SaveChangesAsync();

        if (string.IsNullOrWhiteSpace(returnUrl))
        {
            returnUrl = GetAppHomeUrl();
        }

        if (!string.IsNullOrWhiteSpace(returnUrlHash))
        {
            returnUrl = returnUrl + returnUrlHash;
        }

        return Json(new AjaxResponse { TargetUrl = returnUrl });
    }
}

关键是using (UnitOfWorkManager.Current.SetTenantId(tenantId))语句

为什么我的 UpdateAsync(user) 方法第一次失败，声称用户不存在？

Why does my UpdateAsync(user) method fail the first time, claiming user doesn't exist?

c#

entity-framework

asp.net-boilerplate