访问 Microsoft.Extensions.Hosting 服务时出错。添加 ASP.NET 身份后

Question

我在不同的项目中有 DataContext 和 StartUp class，为了在 Data 项目中添加新的迁移，我使用了以下命令：

dotnet ef migrations add IdentityAdded -s ..\API\API.csproj

这是项目结构：

我刚在基于.Net 5的项目中添加了ASP.Net Core Identity，配置如下：

 public class DataContext : IdentityDbContext<AppUser, AppRole, int, 
    IdentityUserClaim<int>, AppUserRole, IdentityUserLogin<int>,
    IdentityRoleClaim<int>, IdentityUserToken<int>>
    {
        public DataContext(DbContextOptions<DataContext> options) : base(options)
        {
            ChangeTracker.LazyLoadingEnabled = false;
        }

    ... DbSets
    ... protected override void OnModelCreating(ModelBuilder modelBuilder)
        { ... }
   }

IdentityServiceExtension.cs:

public static class IdentityServiceExtension
{
    public static IServiceCollection AddIdentityServices(this IServiceCollection services, IConfiguration configuration)
    {

        services.AddIdentityCore<AppUser>(opt =>
        {
            opt.Password.RequireNonAlphanumeric = false;
        })
        .AddRoles<AppRole>()
        .AddRoleManager<RoleManager<AppRole>>()
        .AddSignInManager<SignInManager<AppUser>>()
        .AddRoleValidator<RoleValidator<AppUser>>()
        .AddEntityFrameworkStores<DataContext>();
    }
}

我刚刚从 Identity 类继承了一些 class，例如 AppUser、AppRole 和 AppUserRole，如下所示：

public class AppRole : IdentityRole<int>
{
    public ICollection<AppUserRole> TheUserRolesList { get; set; }
}

在运行迁移之后，我收到以下错误：

An error occurred while accessing the Microsoft.Extensions.Hosting services. Continuing without the application service provider. Error: Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.RoleManager1[Core.Models.Entities.User.AppRole] Lifetime: Scoped ImplementationType: Microsoft.AspNetCore.Identity.RoleManager1[Core.Models.Entities.User.AppRole]': Implementation type 'Microsoft.AspNetCore.Identity.RoleValidator1[Core.Models.Entities.User.AppUser]' can't be converted to service type 'Microsoft.AspNetCore.Identity.IRoleValidator1[Core.Models.Entities.User.AppRole]')

这个实现有什么问题？

Answer 1

您没有正确注册，而不是：

.AddRoleValidator<RoleValidator<AppUser>>()

添加：

.AddRoleValidator<RoleValidator<AppRole>>()

您的错误指出它无法使用 Core.Models.Entities.User.AppUser 实例化 Microsoft.AspNetCore.Identity.RoleValidator，而是需要 Core.Models.Entities.User.AppRole.

访问 Microsoft.Extensions.Hosting 服务时出错。添加 ASP.NET 身份后

An error occurred while accessing the Microsoft.Extensions.Hosting services. After Adding ASP.NET identity

entity-framework

asp.net-identity

entity-framework-core

asp.net-core