AspNetCore.Identity 不适用于自定义用户/角色实现

Question

因为我倾向于使用Guid作为我的主键类型，所以我的User和Role类实现如下

public class User : IdentityUser<Guid, UserClaim, UserRole, UserLogin>
{
}

public class Role : IdentityRole<Guid, UserRole, RoleClaim>
{
}

请注意， UserClaim 、 UserRole 、 UserLogin和RoleClaim都以相同的方式实现

这是我的DbContext实现

public class ApplicationDbContext : IdentityDbContext<User, Role, Guid, UserClaim, UserRole, UserLogin, RoleClaim, UserToken>
{
}

到目前为止一切都很好，除了 AspNetCore 的新 DI 容器在默认情况下似乎不喜欢我的自定义实现。 来自我的 Startup.cs 文件的以下代码行引发如下所示的错误

services
    .AddIdentity<User, Role>()
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddDefaultTokenProviders();

GenericArguments[0], 'NewCo.DomainModel.Models.Identity.User', on 'Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore`4[TUser,TRole,TContext,TKey]' 违反了类型'TUser'的约束。

我假设这是因为默认的 Identity gremlin 被实现为使用IdentityUser<string> ，我使用的是IdentityUser<Guid> 。

我接下来该怎么做？ （我完全没有想法）

注意：我正在针对截至周一（2016 年 6 月 27 日）和 Visual Studio Update 3（如果这对任何人有帮助）的 Microsoft 官方 .NET Core 和 ASP.NET Core 版本进行构建

Answer 1

由于您使用的是自定义键类型，因此在调用AddEntityFrameworkStores时必须指定它：

services
    .AddIdentity<User, Role>()
    .AddEntityFrameworkStores<ApplicationDbContext, Guid>()
    .AddDefaultTokenProviders();

Answer 2

我最终得到了这个解决方案：
实际上我做了我自己的抽象IdentityDbContext然后你可以传递任何自定义模型，唯一的问题是在创建 db EF 时向除用户和角色（继承）以外的所有表添加一个 Disriminator 字段

public abstract class ApplicationDbContext<TUser, TRole, TKey, TUserClaim, TUserRole, TUserLogin, TRoleClaim, TUserToken> : IdentityDbContext<TUser, TRole, TKey>
    where TUser : IdentityUser<TKey>
    where TRole : IdentityRole<TKey>
    where TKey : IEquatable<TKey>
    where TUserClaim : IdentityUserClaim<TKey>
    where TUserRole : IdentityUserRole<TKey>
    where TUserLogin : IdentityUserLogin<TKey>
    where TRoleClaim : IdentityRoleClaim<TKey>
    where TUserToken : IdentityUserToken<TKey>
{
    public ApplicationDbContext(DbContextOptions options) : base(options) { }

    protected ApplicationDbContext() { }

    public new DbSet<TRoleClaim> RoleClaims { get; set; }
    public new DbSet<TRole> Roles { get; set; }
    public new DbSet<TUserClaim> UserClaims { get; set; }
    public new DbSet<TUserLogin> UserLogins { get; set; }
    public new DbSet<TUserRole> UserRoles { get; set; }
    public new DbSet<TUser> Users { get; set; }
    public new DbSet<TUserToken> UserTokens { get; set; }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
    }
}

public class AppDbContext : ApplicationDbContext<ApplicationUser, ApplicationRole, Guid, ApplicationUserClaim, ApplicationUserRole, ApplicationUserLogin, ApplicationRoleClaim, ApplicationUserToken>
{
    public AppDbContext(DbContextOptions<AppDbContext> options)
        : base(options)
    {
    }

    //public new DbSet<ApplicationUserClaim> UserClaims { get; set; }

    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);
    }
}

  services.AddIdentity<ApplicationUser, ApplicationRole>()
                .AddEntityFrameworkStores<AppDbContext, Guid>()
                .AddDefaultTokenProviders()
                .AddUserStore<UserStore<ApplicationUser, ApplicationRole, AppDbContext, Guid>>()
                .AddRoleStore<RoleStore<ApplicationRole, AppDbContext, Guid>>()

public class ApplicationUser : IdentityUser<Guid>
{
    public ApplicationUser()
    {
        //this.Id = Guid.NewGuid();
    }

    public ApplicationUser(string userName) : this() { this.UserName = userName; }
    public Guid ClientId { get; set; }
    //public new ICollection<ApplicationUserClaim> Claims { get; set; }
}

//public class ApplicationRole : IdentityRole<Guid, ApplicationUserRole, ApplicationRoleClaim>
public class ApplicationRole : IdentityRole<Guid>
{
    public ApplicationRole()
    {
        //this.Id = Guid.NewGuid();
    }

    public ApplicationRole(string name) : this() { this.Name = name; }
}

public class ApplicationRoleClaim : IdentityRoleClaim<Guid> { }
//[NotMapped]
public class ApplicationUserClaim : IdentityUserClaim<Guid> { }

public class ApplicationUserLogin : IdentityUserLogin<Guid> { }

public class ApplicationUserRole : IdentityUserRole<Guid> { }

public class ApplicationUserToken : IdentityUserToken<Guid> { }

Answer 3

“UserStore`4[TUser,TRole,TContext,TKey]' 违反了类型 'TUser' 的约束。”

您需要使用 Guid 创建一个 UserStore，并更改您的 DbContext

public class ApplicationUser : IdentityUser<Guid> { }

public class ApplicationRole : IdentityRole<Guid> { }

public class ApplicationUserStore : UserStore<ApplicationUser, ApplicationRole, ApplicationDbContext, Guid>
{
    public ApplicationUserStore(ApplicationDbContext context, IdentityErrorDescriber describer = null) : base(context, describer)
    {
    }
}

新的 ApplicationDbContext 继承

public class ApplicationDbContext : IdentityDbContext<ApplicationUser, ApplicationRole, Guid>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options) { }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
    }
}

在你的startup.cs

services
    .AddIdentity<ApplicationUser, ApplicationRole>()
    .AddUserStore<ApplicationUserStore>()
    .AddEntityFrameworkStores<ApplicationDbContext, Guid>()
    .AddDefaultTokenProviders();

Answer 4

在使用自定义用户和角色实体的情况下，指定 Key to .AddEntityFrameworkStore() 方法。同时在启动时注册身份

.AddEntityFrameworkStores<IdentityDbContext, TKey>()

因为它默认使用密钥类型字符串，并且在其他密钥类型的情况下会导致错误。