不能在实体 'AspNetUsers' 的模式“”中使用 table 'AspNetUsers'，因为它正用于另一个实体

Question

我们正在尝试通过扩展 AspNetUsers 将 Identity 3 添加到我们现有的 Customers 应用程序

    public class ApplicationUser : IdentityUser
{
    public string BusinessName { get; set; }
    public string ContactName { get; set; }
    public string CountryCode { get; set; }
    public virtual Countries Country { get; set; }
    public string AddressLabel { get; set; }
    public string Phone { get; set; }
    public DateTime? FollowUp { get; set; }
    public bool MailingList { get; set; }
    public int SubscriptionId { get; set; }
    [ForeignKey("SubscriptionId")]
    public virtual Subscriptions Subscription { get; set; }
    public virtual ICollection<Devices> Devices { get; set; }
    public virtual ICollection<Downloads> Downloads { get; set; }
    public virtual ICollection<Invoices> Invoices { get; set; }
    public virtual ICollection<Notes> Notes { get; set; }
    public virtual ICollection<Referrals> Referrals { get; set; }
}

CustomersContext 继承自 IdentityDbContext

    public partial class CustomersContext : IdentityDbContext<ApplicationUser>
{
    protected override void OnConfiguring(DbContextOptionsBuilder options)
    {
        options.UseSqlServer(@"Server=(localdb)\mssqllocaldb;Database=Customers;Trusted_Connection=True;MultipleActiveResultSets=true");
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);// we have to do this becauee we are inheriting from IdentityDbContext<ApplicationUser> not DbContext
        modelBuilder.Entity<AspNetRoleClaims>(entity =>
        {
            entity.Property(e => e.RoleId).HasMaxLength(450);

            entity.HasOne(d => d.Role).WithMany(p => p.AspNetRoleClaims).HasForeignKey(d => d.RoleId);
        });

        modelBuilder.Entity<AspNetRoles>(entity =>
        {
            entity.HasIndex(e => e.NormalizedName).HasName("RoleNameIndex");

            entity.Property(e => e.Id).HasMaxLength(450);

            entity.Property(e => e.Name).HasMaxLength(256);

            entity.Property(e => e.NormalizedName).HasMaxLength(256);
        });

        modelBuilder.Entity<AspNetUserClaims>(entity =>
        {
            entity.Property(e => e.UserId).HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.AspNetUserClaims).HasForeignKey(d => d.UserId);
        });

        modelBuilder.Entity<AspNetUserLogins>(entity =>
        {
            entity.HasKey(e => new { e.LoginProvider, e.ProviderKey });

            entity.Property(e => e.LoginProvider).HasMaxLength(450);

            entity.Property(e => e.ProviderKey).HasMaxLength(450);

            entity.Property(e => e.UserId).HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.AspNetUserLogins).HasForeignKey(d => d.UserId);
        });

        modelBuilder.Entity<AspNetUserRoles>(entity =>
        {
            entity.HasKey(e => new { e.UserId, e.RoleId });

            entity.Property(e => e.UserId).HasMaxLength(450);

            entity.Property(e => e.RoleId).HasMaxLength(450);

            entity.HasOne(d => d.Role).WithMany(p => p.AspNetUserRoles).HasForeignKey(d => d.RoleId).OnDelete(DeleteBehavior.Restrict);

            entity.HasOne(d => d.User).WithMany(p => p.AspNetUserRoles).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<ApplicationUser>(entity =>
        {
            entity.HasIndex(e => e.BusinessName).HasName("BusinessNameIndex");

            entity.HasIndex(e => e.NormalizedEmail).HasName("EmailIndex");

            entity.HasIndex(e => e.NormalizedUserName).HasName("UserNameIndex");

            entity.Property(e => e.Id).HasMaxLength(450);

            entity.Property(e => e.AddressLabel)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.BusinessName)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.ContactName)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.CountryCode)
                .IsRequired()
                .HasMaxLength(2)
                .HasColumnType("varchar")
                .HasDefaultValue("00");

            entity.Property(e => e.Email).HasMaxLength(256);

            entity.Property(e => e.FollowUp).HasColumnType("date");

            entity.Property(e => e.MailingList).HasDefaultValue(true);

            entity.Property(e => e.NormalizedEmail).HasMaxLength(256);

            entity.Property(e => e.NormalizedUserName).HasMaxLength(256);

            entity.Property(e => e.UserName).HasMaxLength(256);

            entity.HasOne(d => d.Country).WithMany(p => p.Users).HasForeignKey(d => d.CountryCode).OnDelete(DeleteBehavior.Restrict);

            entity.HasOne(d => d.Subscription).WithMany(p => p.Users).HasForeignKey(d => d.SubscriptionId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Countries>(entity =>
        {
            entity.HasKey(e => e.CountryCode);

            entity.Property(e => e.CountryCode)
                .HasMaxLength(2)
                .HasColumnType("varchar");

            entity.Property(e => e.CalCost).HasColumnType("decimal");

            entity.Property(e => e.CountryName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.CultureCode)
                .IsRequired()
                .HasMaxLength(8)
                .HasColumnType("varchar");

            entity.Property(e => e.CurrencyCode)
                .IsRequired()
                .HasMaxLength(3)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceFooter)
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.TaxName)
                .HasMaxLength(3)
                .HasColumnType("varchar");

            entity.Property(e => e.TaxRate).HasColumnType("decimal");
        });

        modelBuilder.Entity<Devices>(entity =>
        {
            entity.HasKey(e => e.DeviceID);

            entity.Property(e => e.CALs).HasDefaultValue(0);

            entity.Property(e => e.DeviceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.UnlockedFrom).HasColumnType("date");

            entity.Property(e => e.UnlockedTo).HasColumnType("date");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Devices).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Downloads>(entity =>
        {
            entity.HasKey(e => e.DownloadId);

            entity.Property(e => e.DownloadDate).HasColumnType("date");

            entity.Property(e => e.DownloadVersion)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Downloads).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Invoices>(entity =>
        {
            entity.HasKey(e => e.InvoiceNr);

            entity.Property(e => e.AddressLabel)
                .IsRequired()
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceDate).HasColumnType("date");

            entity.Property(e => e.InvoiceDescription)
                .IsRequired()
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceNet).HasColumnType("money");

            entity.Property(e => e.InvoiceTax).HasColumnType("money");

            entity.Property(e => e.InvoiceTotal).HasColumnType("money");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Invoices).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Notes>(entity =>
        {
            entity.HasKey(e => e.NoteId);

            entity.Property(e => e.NoteDate).HasColumnType("date");

            entity.Property(e => e.NoteSubject)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.NoteText)
                .IsRequired()
                .HasColumnType("varchar");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Notes).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<ReferralSources>(entity =>
        {
            entity.HasKey(e => e.ReferralSourceId);

            entity.Property(e => e.ReferralSourceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");
        });

        modelBuilder.Entity<Referrals>(entity =>
        {
            entity.HasKey(e => e.ReferralId);

            entity.Property(e => e.ReferralDate).HasColumnType("date");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.ReferralSource).WithMany(p => p.Referrals).HasForeignKey(d => d.ReferralSourceID).OnDelete(DeleteBehavior.Restrict);

            entity.HasOne(d => d.User).WithMany(p => p.Referrals).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Subscriptions>(entity =>
        {
            entity.HasKey(e => e.SubscriptionId);

            entity.Property(e => e.SubscriberId)
                .IsRequired()
                .HasMaxLength(450);

            entity.Property(e => e.SubscriptionExpires).HasColumnType("date");
            entity.Property(e => e.TotalCALs).HasDefaultValue(0);

        });
    }

    public virtual DbSet<AspNetRoleClaims> AspNetRoleClaims { get; set; }
    public virtual DbSet<AspNetRoles> AspNetRoles { get; set; }
    public virtual DbSet<AspNetUserClaims> AspNetUserClaims { get; set; }
    public virtual DbSet<AspNetUserLogins> AspNetUserLogins { get; set; }
    public virtual DbSet<AspNetUserRoles> AspNetUserRoles { get; set; }
    public virtual DbSet<ApplicationUser> ApplicationUser { get; set; }
    public virtual DbSet<Countries> Countries { get; set; }
    public virtual DbSet<Devices> Devices { get; set; }
    public virtual DbSet<Downloads> Downloads { get; set; }
    public virtual DbSet<Invoices> Invoices { get; set; }
    public virtual DbSet<Notes> Notes { get; set; }
    public virtual DbSet<ReferralSources> ReferralSources { get; set; }
    public virtual DbSet<Referrals> Referrals { get; set; }
    public virtual DbSet<Subscriptions> Subscriptions { get; set; }
}

我们正在尝试使用 Microsoft 身份验证。当我运行该应用程序并使用 Microsoft 帐户登录时，该应用程序在 AccountController ExternalLoginCallback 这一行

中爆炸

 var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent: false);

错误是

Cannot use table 'AspNetUsers' in schema '' for entity 'AspNetUsers' since it is being used for another entity.

除了 CustomersContext 之外没有其他 dbContext。除了 ApplicationUser，我找不到任何映射到 AspNetUsers 的实体。

没有迁移。如果我尝试创建初始迁移，也会出现同样的错误。

dnx ef migrations add initial

对包含的代码量表示歉意，但仍未包含关键信息。

Answer 1

由于您继承自 IdentityDbContext，因此无需重新创建 AspNet* DbSet，只需添加新的 table.
您的 CustomersContext 应如下所示：

public partial class CustomersContext : IdentityDbContext<ApplicationUser>
{
    protected override void OnConfiguring(DbContextOptionsBuilder options)
    {
        options.UseSqlServer(@"Server=(localdb)\mssqllocaldb;Database=Customers;Trusted_Connection=True;MultipleActiveResultSets=true");
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);// we have to do this because we are inheriting from IdentityDbContext<ApplicationUser> not DbContext

        // override the users tables with your properties
        modelBuilder.Entity<ApplicationUser>(entity =>
        {
            entity.HasIndex(e => e.BusinessName).HasName("BusinessNameIndex");

            entity.HasIndex(e => e.NormalizedEmail).HasName("EmailIndex");

            entity.HasIndex(e => e.NormalizedUserName).HasName("UserNameIndex");

            entity.Property(e => e.Id).HasMaxLength(450);

            entity.Property(e => e.AddressLabel)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.BusinessName)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.ContactName)
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.CountryCode)
                .IsRequired()
                .HasMaxLength(2)
                .HasColumnType("varchar")
                .HasDefaultValue("00");

            entity.Property(e => e.FollowUp).HasColumnType("date");

            entity.Property(e => e.MailingList).HasDefaultValue(true);

            entity.HasOne(d => d.Country).WithMany(p => p.Users).HasForeignKey(d => d.CountryCode).OnDelete(DeleteBehavior.Restrict);

            entity.HasOne(d => d.Subscription).WithMany(p => p.Users).HasForeignKey(d => d.SubscriptionId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Countries>(entity =>
        {
            entity.HasKey(e => e.CountryCode);

            entity.Property(e => e.CountryCode)
                .HasMaxLength(2)
                .HasColumnType("varchar");

            entity.Property(e => e.CalCost).HasColumnType("decimal");

            entity.Property(e => e.CountryName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.CultureCode)
                .IsRequired()
                .HasMaxLength(8)
                .HasColumnType("varchar");

            entity.Property(e => e.CurrencyCode)
                .IsRequired()
                .HasMaxLength(3)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceFooter)
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.TaxName)
                .HasMaxLength(3)
                .HasColumnType("varchar");

            entity.Property(e => e.TaxRate).HasColumnType("decimal");
        });

        modelBuilder.Entity<Devices>(entity =>
        {
            entity.HasKey(e => e.DeviceID);

            entity.Property(e => e.CALs).HasDefaultValue(0);

            entity.Property(e => e.DeviceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.UnlockedFrom).HasColumnType("date");

            entity.Property(e => e.UnlockedTo).HasColumnType("date");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Devices).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Downloads>(entity =>
        {
            entity.HasKey(e => e.DownloadId);

            entity.Property(e => e.DownloadDate).HasColumnType("date");

            entity.Property(e => e.DownloadVersion)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Downloads).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Invoices>(entity =>
        {
            entity.HasKey(e => e.InvoiceNr);

            entity.Property(e => e.AddressLabel)
                .IsRequired()
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceDate).HasColumnType("date");

            entity.Property(e => e.InvoiceDescription)
                .IsRequired()
                .HasMaxLength(255)
                .HasColumnType("varchar");

            entity.Property(e => e.InvoiceNet).HasColumnType("money");

            entity.Property(e => e.InvoiceTax).HasColumnType("money");

            entity.Property(e => e.InvoiceTotal).HasColumnType("money");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Invoices).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Notes>(entity =>
        {
            entity.HasKey(e => e.NoteId);

            entity.Property(e => e.NoteDate).HasColumnType("date");

            entity.Property(e => e.NoteSubject)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");

            entity.Property(e => e.NoteText)
                .IsRequired()
                .HasColumnType("varchar");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.User).WithMany(p => p.Notes).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<ReferralSources>(entity =>
        {
            entity.HasKey(e => e.ReferralSourceId);

            entity.Property(e => e.ReferralSourceName)
                .IsRequired()
                .HasMaxLength(50)
                .HasColumnType("varchar");
        });

        modelBuilder.Entity<Referrals>(entity =>
        {
            entity.HasKey(e => e.ReferralId);

            entity.Property(e => e.ReferralDate).HasColumnType("date");

            entity.Property(e => e.UserId)
                .IsRequired()
                .HasMaxLength(450);

            entity.HasOne(d => d.ReferralSource).WithMany(p => p.Referrals).HasForeignKey(d => d.ReferralSourceID).OnDelete(DeleteBehavior.Restrict);

            entity.HasOne(d => d.User).WithMany(p => p.Referrals).HasForeignKey(d => d.UserId).OnDelete(DeleteBehavior.Restrict);
        });

        modelBuilder.Entity<Subscriptions>(entity =>
        {
            entity.HasKey(e => e.SubscriptionId);

            entity.Property(e => e.SubscriberId)
                .IsRequired()
                .HasMaxLength(450);

            entity.Property(e => e.SubscriptionExpires).HasColumnType("date");
            entity.Property(e => e.TotalCALs).HasDefaultValue(0);

        });
    }

    public virtual DbSet<Countries> Countries { get; set; }
    public virtual DbSet<Devices> Devices { get; set; }
    public virtual DbSet<Downloads> Downloads { get; set; }
    public virtual DbSet<Invoices> Invoices { get; set; }
    public virtual DbSet<Notes> Notes { get; set; }
    public virtual DbSet<ReferralSources> ReferralSources { get; set; }
    public virtual DbSet<Referrals> Referrals { get; set; }
    public virtual DbSet<Subscriptions> Subscriptions { get; set; }
}

或者你完全可以不调用base.OnModelCreating创建模型，你可以复制OnModelCreatingfrom the source code

Answer 2

我在使用以下场景时遇到了同样的问题：

脚手架身份（代码优先）
使用迁移（代码优先）使用身份表更新同一个数据库
从数据库搭建数据库上下文。（首先是数据库）

目前，我正在尝试使用单独的数据库进行身份验证，以获得以下收益：

将 Microsoft 标识保留为单独的模块，以便您可以更新它或从您的应用程序中轻松删除它。
创建一个在多个应用程序之间登录架构。
为了保持两种方式都灵活的应用程序上下文，即 DB-first 或代码优先。

现在的挑战是在应用程序的数据层同时使用这两个数据库。

不能在实体 'AspNetUsers' 的模式“”中使用 table 'AspNetUsers'，因为它正用于另一个实体

Cannot use table 'AspNetUsers' in schema '' for entity 'AspNetUsers' since it is being used for another entity

entity-framework-core

asp.net-core-mvc

asp.net-identity-3

asp.net-core