Question

我正在将ASP.NET Core 1.0应用程序迁移到ASP.NET Core 2.0。

在我的创业公司中，我正在配置两个身份：

services.AddIdentity<IdentityUser, IdentityRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddUserStore<IdentityUserStore<IdentityUser>>()
   .AddRoleStore<IdentityRoleStore<IdentityRole>>();

services.AddIdentity<Customer, CustomerRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddErrorDescriber<CustomerIdentityErrorDescriber>()
   .AddUserStore<CustomerStore<Customer>>()
   .AddRoleStore<CustomerRoleStore<CustomerRole>>();

这在ASP.NET Core 1.0中运行良好，但失败并出现错误： System.InvalidOperationException：'方案已存在：ASP.NET Core 2.0中的Identity.Application'。

在ASP.NET Core 2.0中，如果删除对AddIdentity的一个调用，则错误消失。如何迁移我的代码，以便在我的应用程序中使用两种不同类型的身份用户和角色？或者，当我在ASP.NET Core 1.0中编写它时，我是否只是在理解事情如何工作方面犯了一个根本错误？

Answer 1

在浏览github上的ASP.NET Core源代码后，可以使用此扩展方法添加第二个标识：

using Microsoft.AspNetCore.Identity;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;
using System;
using System.Collections.Generic;
using System.Text;

namespace Whatever
{
    public static class IdentityExtensions
    {
        public static IdentityBuilder AddSecondIdentity<TUser, TRole>(
            this IServiceCollection services)
            where TUser : class
            where TRole : class
        {
            services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
            services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
            services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
            services.TryAddScoped<IRoleValidator<TRole>, RoleValidator<TRole>>();
            services.TryAddScoped<ISecurityStampValidator, SecurityStampValidator<TUser>>();
            services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser, TRole>>();
            services.TryAddScoped<UserManager<TUser>, AspNetUserManager<TUser>>();
            services.TryAddScoped<SignInManager<TUser>, SignInManager<TUser>>();
            services.TryAddScoped<RoleManager<TRole>, AspNetRoleManager<TRole>>();

            return new IdentityBuilder(typeof(TUser), typeof(TRole), services);
        }
    }
}

Answer 2

非常感谢您的回答。这节省了我很多时间！一个小改进：我必须配置一些选项（IdentityOptions）。例如：“密码复杂性规则”。

因此，我包括了Action setupAction的注册。（这与Microsoft在IdentityServiceCollectionExtension中的AddIdentity中执行此操作的方式相同）

public static class IdentityExtensions
{
    public static IdentityBuilder AddSecondIdentity<TUser, TRole>(
        this IServiceCollection services, Action<IdentityOptions> setupAction)
        where TUser : class
        where TRole : class
    {
        services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
        services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
        services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
        services.TryAddScoped<IRoleValidator<TRole>, RoleValidator<TRole>>();
        services.TryAddScoped<ISecurityStampValidator, SecurityStampValidator<TUser>>();
        services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser, TRole>>();
        services.TryAddScoped<UserManager<TUser>, AspNetUserManager<TUser>>();
        services.TryAddScoped<SignInManager<TUser>, SignInManager<TUser>>();
        services.TryAddScoped<RoleManager<TRole>, AspNetRoleManager<TRole>>();

        if (setupAction != null)
            services.Configure(setupAction);

        return new IdentityBuilder(typeof(TUser), typeof(TRole), services);
    }
}

Answer 3

Asp.net Core 2.2为此提供了一种内置方法。

AddIdentityCore<TUser>

如何使用它：

services.AddIdentity<IdentityUser, IdentityRole>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddUserStore<IdentityUserStore<IdentityUser>>()
   .AddRoleStore<IdentityRoleStore<IdentityRole>>();

services.AddIdentityCore<Customer>(configureIdentity)
   .AddDefaultTokenProviders()
   .AddErrorDescriber<CustomerIdentityErrorDescriber>()
   .AddUserStore<CustomerStore<Customer>>()
   .AddRoleStore<CustomerRoleStore<CustomerRole>>();

services.AddScoped<RoleManager<Customer>>();

实际上，请从asp.net core 2.2 github repo

阅读此方法的实现

    /// <summary>
    /// Adds and configures the identity system for the specified User type. Role services are not added by default 
    /// but can be added with <see cref="IdentityBuilder.AddRoles{TRole}"/>.
    /// </summary>
    /// <typeparam name="TUser">The type representing a User in the system.</typeparam>
    /// <param name="services">The services available in the application.</param>
    /// <param name="setupAction">An action to configure the <see cref="IdentityOptions"/>.</param>
    /// <returns>An <see cref="IdentityBuilder"/> for creating and configuring the identity system.</returns>
    public static IdentityBuilder AddIdentityCore<TUser>(this IServiceCollection services, Action<IdentityOptions> setupAction)
        where TUser : class
    {
        // Services identity depends on
        services.AddOptions().AddLogging();

        // Services used by identity
        services.TryAddScoped<IUserValidator<TUser>, UserValidator<TUser>>();
        services.TryAddScoped<IPasswordValidator<TUser>, PasswordValidator<TUser>>();
        services.TryAddScoped<IPasswordHasher<TUser>, PasswordHasher<TUser>>();
        services.TryAddScoped<ILookupNormalizer, UpperInvariantLookupNormalizer>();
        services.TryAddScoped<IUserConfirmation<TUser>, DefaultUserConfirmation<TUser>>();
        // No interface for the error describer so we can add errors without rev'ing the interface
        services.TryAddScoped<IdentityErrorDescriber>();
        services.TryAddScoped<IUserClaimsPrincipalFactory<TUser>, UserClaimsPrincipalFactory<TUser>>();
        services.TryAddScoped<UserManager<TUser>>();

        if (setupAction != null)
        {
            services.Configure(setupAction);
        }

        return new IdentityBuilder(typeof(TUser), services);
    }

ASP.NET Core 2.0中的多个身份

3 个答案: