c# - Azure ASP.NET Core POST 400 错误请求 Blazor Webassemble

Question

我一直在尝试在 Azure 应用服务上部署我的 asp.net core 托管 blazor web assembly 应用程序，但是，我在使 api 正常工作时遇到问题。当我尝试将用户的数据保存到数据库中时，收到 400 bad request 错误。它在本地主机上运行良好。我环顾四周，发现建议我使用 Azure 中的日志流来获取更详细的错误消息，尽管我不确定这些详细信息是否真的有帮助，但它就是这样。

2020-06-22 22:24:54 MYPROJECT POST /api/Register/Post X-ARR-LOG-ID=ef27263e-dead-417a-b136-89a217a6f931 443 - MYIP Mozilla/5.0+(Windows+NT+10.0;+Win64;+x64)+AppleWebKit/537.36+(KHTML,+like+Gecko)+Chrome/83.0.4103.97+Safari/537.36 ARRAffinity=7f74b113b9ae575a087ae1fa07a63858e6e34f27224b7aa1a957b06074e65ffd https://myproject.azurewebsites.net/Register

以下是相关的应用程序代码:

//Register.razor in client project
@code {
    private RegisterModel Model = new RegisterModel();
    private bool ShowErrors;

    private List<string> Errors = new List<string>();
    private async Task HandleValidSubmit()
    {
        ShowErrors = false;
        Errors.Clear();
        if (Model.Password.Length >= 6 && Model.Password == Model.ConfirmPassword)
        {
            await HttpClient.PostAsJsonAsync<RegisterModel>("api/Register/Post", Model);
            NavigationManager.NavigateTo("/");
        }
        else 
        {
            if (Model.Password.Length > 100 || Model.Password.Length < 6)
            {
                Errors.Add("Password must be between 6 and 100 characters in length.");
            }
            if (Model.Password != Model.ConfirmPassword)
            {
                Errors.Add("Passwords do not match.");
            }
            ShowErrors = true;
        }
    }
}

//RegisterController.cs in server project
[Route("api/Register")]
    public class RegisterController : Controller
    {
        private UserContext UserContext { get; set; }
        private IHasher Hasher = new Pbkdf2Hasher();
        public RegisterController (UserContext userContext)
        {
            UserContext = userContext;
        }

        [RequireHttps]
        [HttpPost]
        [Route("Post")]
        public async Task Post([FromBody]RegisterModel model)
        {
            var user = new UserModel
            {
                Email = model.Email,
                Password = Hasher.Hash(model.Password)
            };
            await UserContext.AddAsync(user);
            await UserContext.SaveChangesAsync();
        }
    }

//Startup.cs in Server project
            public void ConfigureServices(IServiceCollection services)
                services.AddDbContext<UserContext>(options =>
                    options.UseSqlServer(Configuration.GetConnectionString("UsersConnection"),
                    sqlServerOptionsAction: sqlOptions =>
                    {
                        sqlOptions.EnableRetryOnFailure();
                    }));

在发布项目时，我为“用户”配置了 Azure SQL 数据库，选中复选框以在运行时使用 UsersConnection 字符串，并在发布时应用 UserContext Entity Framework 迁移。

我使用的是Visual Studio 2019，目标框架是netcoreapp3.1。我将不胜感激任何指导。谢谢!

编辑

查看详细日志后，显然数据库还没有建立？

INSERT INTO [Users] ([Email], [Password])
VALUES (@p0, @p1);
2020-06-22 22:19:47.208 +00:00 [Error] Microsoft.EntityFrameworkCore.Update: An exception occurred in the database while saving changes for context type 'BlazorTodos.Server.Data.UserContext'.
Microsoft.EntityFrameworkCore.DbUpdateException: An error occurred while updating the entries. See the inner exception for details.
 ---> Microsoft.Data.SqlClient.SqlException (0x80131904): Invalid object name 'Users'.

Answer 1

感谢您的所有建议，杰森。帮助我朝着正确的方向前进。

这个问题很愚蠢。显然，数据库和 Entity Framework 设置已自动为我的“Users”和“Todos”数据库提供相同的字符串:

Data Source=tcp:myserver.database.windows.net,1433;Initial Catalog=todos;User Id=<myid>@myserver;Password=<my-password>

但我没有注意到这是同一个字符串。我只需将 Initial Catalog 更改为 users 并使用编辑后的字符串再次检查“在运行时使用此连接字符串”和“在发布时应用此迁移”框。这解决了问题。