实体类型 'IdentityUserToken<string>' 是使用单个键属性定义的，但 3 个值传递给 'DbSet.Find' 方法

Question

我正在研究 .NetCore MVC项目，我不得不对现有数据库进行逆向工程，并且正在做一个真正的噩梦，让ASPIdentity很好地发挥作用。

我不得不在创建的上下文类中手动添加我的标识数据库集，但该类不包括我希望会发生的标识表。我已经设法为我想要的ASPIdentity属性(角色，声明(创建了迁移，并测试了项目的注册/登录/管理方面。当我单击"管理"区域中的"双因素身份验证"选项卡时，我收到以下错误：

ArgumentException: Entity type 'IdentityUserToken<string>' is defined with a single key property, but 3 values were passed to the 'DbSet.Find' method.
Microsoft.EntityFrameworkCore.Internal.EntityFinder<TEntity>.FindTracked(object[] keyValues, out IReadOnlyList<IProperty> keyProperties)
Stack Query Cookies Headers 
ArgumentException: Entity type 'IdentityUserToken<string>' is defined with a single key property, but 3 values were passed to the 'DbSet.Find' method.
Microsoft.EntityFrameworkCore.Internal.EntityFinder<TEntity>.FindTracked(object[] keyValues, out IReadOnlyList<IProperty> keyProperties)
Microsoft.EntityFrameworkCore.Internal.EntityFinder<TEntity>.FindAsync(object[] keyValues, CancellationToken cancellationToken)
Microsoft.EntityFrameworkCore.Internal.InternalDbSet<TEntity>.FindAsync(object[] keyValues, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.EntityFrameworkCore.UserStore<TUser, TRole, TContext, TKey, TUserClaim, TUserRole, TUserLogin, TUserToken, TRoleClaim>.FindTokenAsync(TUser user, string loginProvider, string name, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.UserStoreBase<TUser, TKey, TUserClaim, TUserLogin, TUserToken>.GetTokenAsync(TUser user, string loginProvider, string name, CancellationToken cancellationToken)
Microsoft.AspNetCore.Identity.UI.Pages.Account.Manage.Internal.TwoFactorAuthenticationModel<TUser>.OnGetAsync()
Microsoft.AspNetCore.Mvc.RazorPages.Internal.ExecutorFactory+GenericTaskHandlerMethod.Convert<T>(object taskAsObject)
Microsoft.AspNetCore.Mvc.RazorPages.Internal.ExecutorFactory+GenericTaskHandlerMethod.Execute(object receiver, object[] arguments)
Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker.InvokeHandlerMethodAsync()
Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker.InvokeNextPageFilterAsync()
Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker.Rethrow(PageHandlerExecutedContext context)
Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.RazorPages.Internal.PageActionInvoker.InvokeInnerFilterAsync()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeNextResourceFilter()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Rethrow(ResourceExecutedContext context)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.Next(ref State next, ref Scope scope, ref object state, ref bool isCompleted)
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeFilterPipelineAsync()
Microsoft.AspNetCore.Mvc.Internal.ResourceInvoker.InvokeAsync()
Microsoft.AspNetCore.Builder.RouterMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.MigrationsEndPointMiddleware.Invoke(HttpContext context)
Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.DatabaseErrorPageMiddleware.Invoke(HttpContext httpContext)
Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

Startup.cs中的服务代码

services.AddDefaultIdentity<User>()
.AddRoles<IdentityRole>()
.AddRoleManager<RoleManager<IdentityRole>>()
.AddDefaultTokenProviders()
.AddEntityFrameworkStores<MyContext>();

我的模型构建代码(ASPIdentity 特定代码(：

public partial class MyContext : DbContext
{
public MyContext()
{
}
public MyContext(DbContextOptions<MyContext> options)
: base(options)
{
}
public virtual DbSet<User> User { get; set; }
public virtual DbSet<IdentityUserClaim<string>> IdentityUserClaim { get; set; }
public virtual DbSet<IdentityUserToken<string>> IdentityUserToken { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<IdentityUserClaim<string>>().HasKey(p => new { p.Id });
modelBuilder.Entity<IdentityUserToken<string>>().HasKey(p => new { p.UserId });
}
}

我可以看到我需要包含更多键，但找不到有关关系的任何信息。我创建了一个空白.NetCore MVC应用程序与ASPIdentity并在startup.cs中使用相同的ASPIdentity配置，我不是更明智的，我应该使用什么键或我应该如何构建DbSet？

Answer 1

这是一个老问题，但以防其他人需要这个。

我认为您的问题不在于数据库架构。来自 MVC 应用程序的点击事件中的某些内容最终使用的是 dbset。查找错误。在您的情况下;

var tokenEntity = MyContext.UserTokens.Find(user.Id)

相反，你可以只使用 Linq;

var tokenEntity = MyContext.UserTokens.FirstOrDefault(ut => ut.UserId == user.Id);

只是也添加;

using System.Linq

Answer 2

这篇文章极大地帮助理解了不同Identity属性之间的关系： https://learn.microsoft.com/en-us/ef/core/get-started/aspnetcore/existing-db

我能够使用Microsoft文章中提供的关系信息和模板克服上述问题。

DbContext OnModel创建方法：

modelBuilder.Entity<ApplicationUser>(b =>
{
// Each User can have many UserClaims
b.HasMany(e => e.Claims)
.WithOne(e => e.User)
.HasForeignKey(uc => uc.UserId)
.IsRequired();
// Each User can have many UserLogins
b.HasMany(e => e.Logins)
.WithOne(e => e.User)
.HasForeignKey(ul => ul.UserId)
.IsRequired();
// Each User can have many UserTokens
b.HasMany(e => e.Tokens)
.WithOne(e => e.User)
.HasForeignKey(ut => ut.UserId)
.IsRequired();
// Each User can have many entries in the UserRole join table
b.HasMany(e => e.UserRoles)
.WithOne(e => e.User)
.HasForeignKey(ur => ur.UserId)
.IsRequired();
});
modelBuilder.Entity<ApplicationRole>(b =>
{
// Each Role can have many entries in the UserRole join table
b.HasMany(e => e.UserRoles)
.WithOne(e => e.Role)
.HasForeignKey(ur => ur.RoleId)
.IsRequired();
// Each Role can have many associated RoleClaims
b.HasMany(e => e.RoleClaims)
.WithOne(e => e.Role)
.HasForeignKey(rc => rc.RoleId)
.IsRequired();
});
modelBuilder.Entity<ApplicationUserLogin>(b =>
{
b.HasKey(l => new { l.LoginProvider, l.ProviderKey, l.UserId });
b.ToTable("AspNetUserLogins");
});
modelBuilder.Entity<ApplicationUserRole>(b =>
{
b.HasKey(r => new { r.UserId, r.RoleId });
b.ToTable("AspNetUserRoles");
});
modelBuilder.Entity<ApplicationUserToken>(b =>
{
b.HasKey(t => new { t.UserId, t.LoginProvider, t.Name });
b.ToTable("AspNetUserTokens");
});

(我创建了自己的具有自定义属性的ApplicationUser类(