'No database provider has been configured for this DbContext' on SignInManager.PasswordSignInAsync

Question

.Net Core 1.0.0 - SDK Preview 2 (x64)

.Net Core 1.0.0 - VS "15" Preview 2 (x64)

.Net Core 1.0.0 - Runtime (x64)

So, we updated an RC1 app to the latest versions above. After many hours of switching references, it's running. However, when logging in (AccountController/Login), I am getting an error at:

public class AccountController : BaseController {     public UserManager<ApplicationUser> UserManager { get; private set; }     public SignInManager<ApplicationUser> SignInManager { get; private set; }     private readonly IEmailSender EmailSender;      public AccountController(UserManager<ApplicationUser> userManager, SignInManager<ApplicationUser> signInManager, IEmailSender emailSender)     {         UserManager = userManager;         SignInManager = signInManager;         EmailSender = emailSender;     }      // GET: /Account/Login     [HttpGet]     [AllowAnonymous]     public IActionResult Login(string returnUrl = null)     {         ViewBag.ReturnUrl = returnUrl;         return View();     }      //     // POST: /Account/Login     [HttpPost]     [AllowAnonymous]     [ValidateAntiForgeryToken]     public async Task<IActionResult> Login(ViewModels.Account.LoginViewModel model, string returnUrl = null)     {         if (ModelState.IsValid)         {             // Errs this next line             var result = await SignInManager.PasswordSignInAsync(model.Email, model.Password, model.RememberMe, false); // <-- ERRS HERE '.PasswordSignInAsync'             if (result.Succeeded)                 return RedirectToLocal(returnUrl);              ModelState.AddModelError("", "Invalid email or password.");             return View(model);         }          // If we got this far, something failed, redisplay form         return View(model);     }              

It blows up with the following error message:

InvalidOperationException: No database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions object in its constructor and passes it to the base constructor for DbContext.

Here is the Startup.cs:

public void ConfigureServices(IServiceCollection services)     {         services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));          // Add EF services to the services container.         services.AddEntityFrameworkSqlServer()            .AddDbContext<LogManagerContext>(options =>               options.UseSqlServer(Configuration["Data:DefaultConnection:Connectionstring"]));          services.AddSingleton(c => Configuration);          // Add Identity services to the services container.         services.AddIdentity<ApplicationUser, IdentityRole>()             .AddEntityFrameworkStores<LogManagerContext>()             .AddDefaultTokenProviders();                               // Add MVC services to the services container.         services.AddMvc();          services.AddTransient<IHttpContextAccessor, HttpContextAccessor>();          //Add all SignalR related services to IoC. - Signal R not ready yet - Chad         //services.AddSignalR();          //Add InMemoryCache         services.AddMemoryCache();          services.AddSession(options =>         {             options.IdleTimeout = System.TimeSpan.FromHours(1);             options.CookieName = ".LogManager";         });          // Uncomment the following line to add Web API servcies which makes it easier to port Web API 2 controllers.         // You need to add Microsoft.AspNet.Mvc.WebApiCompatShim package to project.json         // services.AddWebApiConventions();         // Register application services.         services.AddTransient<IEmailSender, AuthMessageSender>();              }      // Configure is called after ConfigureServices is called.     public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)     {         app.UseSession();          // Configure the HTTP request pipeline.         // Add the console logger.         //loggerFactory.MinimumLevel = LogLevel.Information; - moved to appsettings.json -chad         loggerFactory.AddConsole();         loggerFactory.AddDebug();          loggerFactory.AddNLog();          // Add the following to the request pipeline only in development environment.         if (env.IsDevelopment())         {             app.UseBrowserLink();             app.UseDeveloperExceptionPage();             //app.UseDatabaseErrorPage(DatabaseErrorPageOptions.ShowAll);         }         else         {             // Add Error handling middleware which catches all application specific errors and             // sends the request to the following path or controller action.             app.UseExceptionHandler("/Home/Error");         }          env.ConfigureNLog("NLog.config");          // Add static files to the request pipeline.         app.UseStaticFiles();          // Add cookie-based authentication to the request pipeline.         app.UseIdentity();          //SignalR         //app.UseSignalR();          // Add MVC to the request pipeline.         app.UseMvc(routes =>         {             routes.MapRoute(              name: "default",              template: "{controller}/{action}/{id?}",              defaults: new { controller = "Home", action = "Index" }              );              // Uncomment the following line to add a route for porting Web API 2 controllers.             // routes.MapWebApiRoute("DefaultApi", "api/{controller}/{id?}");         });     } 

And here's the Context:

public class ApplicationUser : IdentityUser {     // Add Custom Profile Fields     public string Name { get; set; } }  public class LogManagerContext : IdentityDbContext<ApplicationUser> {     public DbSet<LogEvent> LogEvents { get; set; }     public DbSet<Client> Clients { get; set; }     public DbSet<LogEventsHistory> LogEventsHistory { get; set; }     public DbSet<LogEventsLineHistory> LogEventsLineHistory { get; set; }     public DbSet<LogRallyHistory> LogRallyHistory { get; set; }     public DbSet<Flag> Flags { get; set; }     protected override void OnModelCreating(ModelBuilder builder)     {          builder.Entity<LogEvent>().HasKey(x => x.LogId);         builder.Entity<LogEvent>().ToTable("LogEvents");         builder.Entity<Client>().HasKey(x => x.ClientId);         builder.Entity<Client>().ToTable("Clients");         builder.Entity<LogEventsHistory>().HasKey(x => x.HistoryId);         builder.Entity<Flag>().HasKey(x => x.FlagId);         builder.Entity<Flag>().ToTable("Flags");         builder.Entity<LogRallyHistory>().HasKey(x => x.HistoryId);         builder.Entity<LogEventsLineHistory>().HasKey(x => x.LineHistoryId);          base.OnModelCreating(builder);     } 

Answer 1

If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions object in its constructor and passes it to the base constructor for DbContext.

The error message says your DbContext(LogManagerContext ) needs a constructor which accepts a DbContextOptions. But I couldn't find such a constructor in your DbContext. So adding the below constructor probably solves your problem.

public LogManagerContext(DbContextOptions options) : base(options) { } 

Edit for comment

If you don't register IHttpContextAccessor explicitly, use below code:

services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();  

Answer 2

I could resolve it by overriding Configuration in MyContext through adding connection string to the DbContextOptionsBuilder:

protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)     {         if (!optionsBuilder.IsConfigured)         {             IConfigurationRoot configuration = new ConfigurationBuilder()                .SetBasePath(Directory.GetCurrentDirectory())                .AddJsonFile("appsettings.json")                .Build();             var connectionString = configuration.GetConnectionString("DbCoreConnectionString");             optionsBuilder.UseSqlServer(connectionString);         }     }