Asp.net核心 – 没有这样的表：AspNetUsers

所以我试图为我的asp.net核心应用程序实现用户登录。 我在这里关注微软教程。 我有两个上下文，一个叫做SchoolContext，用于保存所有与学校相关的模型，另一个上下文叫做ApplicationDbContext，用于Account模型。 这都被保存到sqlite数据库。
一切正常，直到我尝试将用户注册到我的上下文。 当我尝试注册我得到的用户时，无法找到AspNetUsers表错误。 如果我查看数据库，我看不到AspNetUser表。 我尝试添加迁移 ，但我仍然得到同样的错误。 为什么没有创建表？

Startup.cs

public class Startup { public IConfigurationRoot Configuration { get; } public Startup(IHostingEnvironment env) { var builder = new ConfigurationBuilder() .SetBasePath(env.ContentRootPath) .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true) .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true) .AddEnvironmentVariables(); Configuration = builder.Build(); } // This method gets called by the runtime. Use this method to add services to the container. public void ConfigureServices(IServiceCollection services) { // Add Context services services.AddDbContext(options => options.UseSqlite(Configuration.GetConnectionString("MainConnection"))); services.AddDbContext(options => options.UseSqlite(Configuration.GetConnectionString("MainConnection"))); // Add Identify servies services.AddIdentity() .AddEntityFrameworkStores() .AddDefaultTokenProviders(); // Add framework services services.AddMvc(); } // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, SchoolContext context) { loggerFactory.AddConsole(Configuration.GetSection("Logging")); loggerFactory.AddDebug(); // Config hot module replacement if (env.IsDevelopment()) { app.UseDeveloperExceptionPage(); app.UseWebpackDevMiddleware(new WebpackDevMiddlewareOptions { HotModuleReplacement = true }); } else { app.UseExceptionHandler("/Home/Error"); } app.UseStaticFiles(); // Enabled Identity app.UseIdentity(); // Confgure routes app.UseMvc(routes => { routes.MapRoute( name: "default", template: "{controller=Home}/{action=Index}/{id?}"); routes.MapSpaFallbackRoute( name: "spa-fallback", defaults: new { controller = "Home", action = "Index" }); }); // Initialize school database [FOR TESTING] DbInitializer.Initialize(context); } } 

ApplicationDbContext.cs

 namespace ContosoUniversity.Data { public class ApplicationDbContext : IdentityDbContext { public ApplicationDbContext(DbContextOptions options): base(options) { } protected override void OnModelCreating(ModelBuilder builder) { base.OnModelCreating(builder); } } } 

ApplicationUser.cs

 namespace ContosoUniversity.Models { // Add profile data for application users by adding properties to the ApplicationUser class public class ApplicationUser : IdentityUser { } } 

appsettings.json

  "ConnectionStrings": { "MainConnection": "Data Source=/home/Josn/AspNetCore/ContosoUniversity/Databases/database.db" }, 

错误

 fail: Microsoft.EntityFrameworkCore.Query.RelationalQueryCompilationContextFactory[1] An exception occurred in the database while iterating the results of a query. Microsoft.Data.Sqlite.SqliteException: SQLite Error 1: 'no such table: AspNetUsers'. at Microsoft.Data.Sqlite.Interop.MarshalEx.ThrowExceptionForRC(Int32 rc, Sqlite3Handle db) at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReader(CommandBehavior behavior) at Microsoft.Data.Sqlite.SqliteCommand.ExecuteReaderAsync(CommandBehavior behavior, CancellationToken cancellationToken) at Microsoft.Data.Sqlite.SqliteCommand.d__53.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 Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.d__20.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 Microsoft.EntityFrameworkCore.Query.Internal.AsyncQueryingEnumerable.AsyncEnumerator.d__8.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 Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.d__82`1.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 Microsoft.EntityFrameworkCore.Query.Internal.TaskResultAsyncEnumerable`1.Enumerator.d__3.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 Microsoft.EntityFrameworkCore.Query.Internal.AsyncLinqOperatorProvider.ExceptionInterceptor`1.EnumeratorExceptionInterceptor.d__5.MoveNext() 

Answer 1

听起来你忘了在包管理器控制台中调用update-database 。 这实际上是将您创建的迁移应用于连接的数据库。

另一个问题可能是您更新表名称的方式。 如果您直接编辑了迁移，则无法知道您在运行时更改了名称，并且仍将查找默认的命名表。

要更改用户表名，您希望在OnModelCreating方法的数据库上下文中执行OnModelCreating ：

 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); builder.Entity() //Use your application user class here .ToTable( "ContosoUsers" ); //Set the table name here } 

然后，您需要创建一个迁移，以确保通过在包管理器控制台中运行以下内容来更新所有内容：

add-migration RenamedUserTable

然后运行快速update-database并再试一次。