Не удается получить доступ к удаленному объекту Asp.net Identity Core - PullRequest
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Не удается получить доступ к удаленному объекту Asp.net Identity Core

0 голосов
/ 23 мая 2018

Я получаю эту ошибку 

System.ObjectDisposedException
  HResult=0x80131622
  Message=Cannot access a disposed object. A common cause of this error is disposing a context that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling Dispose() on the context, or wrapping the context in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances.
  Source=Microsoft.EntityFrameworkCore
  StackTrace:
   at Microsoft.EntityFrameworkCore.Internal.ConcurrencyDetector.AsyncDisposer.Dispose()
   at Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.<MoveNext>d__5.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<ExecuteSingletonAsyncQuery>d__21`1.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.UserManager`1.<FindByNameAsync>d__78.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.UserValidator`1.<ValidateUserName>d__6.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.AspNetCore.Identity.UserValidator`1.<ValidateAsync>d__5.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.UserManager`1.<ValidateUserAsync>d__172.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.UserManager`1.<CreateAsync>d__74.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at Microsoft.AspNetCore.Identity.UserManager`1.<CreateAsync>d__79.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at EmployeeController.<Create>d__3.MoveNext() in Controllers\EmployeeController.cs:line 31

Для следующего кода 

public class EmployeeController : Controller
{
    private readonly UserManager<Employee> userManager;
    public EmployeeController(UserManager<Employee> userManager)
    {
        this.userManager = userManager;
    }

    public ActionResult<string> Get()
    {
        return "Test Employee";
    }

    [HttpPost("Create")]
    public async void Create([FromBody]string employee)
    {
        var user = new Employee { UserName = "test@gmail.com", Email = "test@gmail.com" };
        var d = await userManager.CreateAsync(user, "1234567");
    }
}

Startup.cs 

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<ApplicationDbContext>(options =>
         options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

        services.AddIdentity<Employee, IdentityRole>(opts =>
       {
           opts.Password.RequireDigit = false;
           opts.Password.RequireLowercase = false;
           opts.Password.RequireUppercase = false;
           opts.Password.RequireNonAlphanumeric = false;
           opts.Password.RequiredLength = 7;
           opts.User.RequireUniqueEmail = true;

       }).AddEntityFrameworkStores<ApplicationDbContext>().AddDefaultTokenProviders();

        services.AddAuthentication(opts =>
        {
            opts.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;
            opts.DefaultAuthenticateScheme = JwtBearerDefaults.AuthenticationScheme;
            opts.DefaultChallengeScheme = JwtBearerDefaults.AuthenticationScheme;
        }).AddJwtBearer(cfg =>
        {
            cfg.RequireHttpsMetadata = false;
            cfg.SaveToken = true;
            cfg.TokenValidationParameters = new TokenValidationParameters()
            {
                // standard configuration
                ValidIssuer = Configuration["Auth:Jwt:Issuer"],
                ValidAudience = Configuration["Auth:Jwt:Audience"],
                IssuerSigningKey = new SymmetricSecurityKey(
                Encoding.UTF8.GetBytes(Configuration["Auth:Jwt:Key"])),
                ClockSkew = TimeSpan.Zero,

                // security switches
                RequireExpirationTime = true,
                ValidateIssuer = true,
                ValidateIssuerSigningKey = true,
                ValidateAudience = true
            };
        });


            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseAuthentication();
        app.UseMvc();
    }
}

Do Iнужно что-то зарегистрировать в моем DI?У меня сложилось впечатление, что AddEntityFrameworkStores<ApplicationDbContext>() будет достаточно.

1 Ответ

0 голосов
/ 23 мая 2018

Вы - async void жертва: 

[HttpPost("Create")]
public async void Create([FromBody]string employee)
{
    var user = new Employee { UserName = "test@gmail.com", Email = "test@gmail.com" };
    var d = await userManager.CreateAsync(user, "1234567");
}

Вы отправляете асинхронную операцию, ожидающую , а не , и контекст будет удален до await context.SaveChangesAsync() вCreateAsync.

Быстрое, очевидное решение: 

[HttpPost("Create")]
public async Task Create([FromBody]string employee)
{
    var user = new Employee { UserName = "test@gmail.com", Email = "test@gmail.com" };
    var d = await userManager.CreateAsync(user, "1234567");
}

Однако вы всегда должны возвращать IActionResult из действия.Это облегчает изменение кода ответа и показывает ваши намерения: 

[HttpPost("Create")]
public async Task<IActionResult> Create([FromBody]string employee)
{
    var user = new Employee { UserName = "test@gmail.com", Email = "test@gmail.com" };
    var d = await userManager.CreateAsync(user, "1234567");

    if (d == IdentityResult.Success)
    {
        return Ok();
    }
    else 
    {
        return BadRequest(d);
    }
}
...