c# - ASP.NET Core 2.1 - IdentityUser 问题 - 无法为 'IdentityUser' 创建 DbSet 此类型不包含在上下文模型中

Question

我已将我的代码从 ASP.NET Core 2.0 升级到 Core 2.1。我创建了一个新的 Core 2.1 项目并将我的代码移动到新项目中。我提供了我的启动示例和 ApplicationDbContext

尝试登录时出现以下错误

Cannot create a DbSet for 'IdentityUser' because this type is not included in the model for the context. Microsoft.EntityFrameworkCore.Internal.InternalDbSet.get_EntityType()

启动.cs

//Core 2.1
  services.AddDefaultIdentity<IdentityUser>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();            

////Old Core 2.0 Code
  //services.AddIdentity<ApplicationUser, IdentityRole>()
        //    .AddEntityFrameworkStores<ApplicationDbContext>()
        //    .AddDefaultTokenProviders();

ApplicationDbContext.cs

public partial class ApplicationDbContext : 
    IdentityDbContext<ApplicationUser>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> 
 options)
        : base(options)
    {
        Database.EnsureCreated();
     }
 }

我查看了以下 Microsoft 文章: https://blogs.msdn.microsoft.com/webdev/2018/05/30/asp-net-core-2-1-0-now-available/

https://learn.microsoft.com/en-us/aspnet/core/migration/20_21?view=aspnetcore-2.1

Answer 1

尝试更改 public partial class ApplicationDbContext : IdentityDbContext<ApplicationUser>至 public partial class ApplicationDbContext : IdentityDbContext<IdentityUser>

编译器会生成DbSet使用提供给通用的类型 IdentityDbContext<TUser>类。