實體類型 &#39;IdentityUserToken<string> &#39; 使用單個鍵屬性定義，但 3 個值已傳遞給 &#39;DbSet.Find&#39; 方法

Question

我正在 .NetCore MVC 項目中工作，我不得不對現有的數據庫進行逆向工程，但我真的很難讓 ASPIdentity 正常運行。

我不得不在創建的 Context 類中手動添加我的 Identity DbSets，但它不包括我希望發生的 Identity 表。 我已經成功地為我想要的 ASPIdentity 屬性（角色、聲明）創建了遷移，並測試了項目的注冊/登錄/管理方面。 單擊“管理”區域中的“雙因素身份驗證”選項卡時，出現以下錯誤：

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服務代碼

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

我的 onModelBuilding 代碼（ASPidentity 特定代碼）：

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的鍵，但找不到任何關於關系的信息。 我用 ASPIdentity 創建了一個空白的 .NetCore MVC 應用程序，並在startup.cs使用了相同的 ASPIdentity 配置，但我不知道，我應該使用什么鍵或者我應該如何構建DbSet ？

Answer 1

這篇文章極大地幫助了理解不同身份屬性之間的關系： https : //docs.microsoft.com/en-us/ef/core/get-started/aspnetcore/existing-db

我能夠使用 Microsoft 文章中提供的關系信息和模板克服上述問題。

DbContext OnModelCreating 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");
});

（我用自定義屬性創建了自己的ApplicationUser類）

Answer 2

這是一個老問題，但以防萬一其他人需要這個。

我不認為您的問題與 db 架構有關。 您的 MVC 應用程序的點擊事件中的某些內容最終使用了 dbset.Find。在您的情況下；

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

相反，您可以使用 Linq；

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

也只需添加;

using System.Linq