EF Core：Update-Database命令未創建用戶表

Question

遵循本教程，我在VS2017 ver 15.3.3上創建了ASP.NET Core 1.1.1 - Code first VS2017 ver 15.3.3 ASP.NET Core 1.1.1 - Code first應用程序。 本教程和我的應用程序之間的唯一區別是，我選擇了“ Individual User Accounts選項，並且我使用的是SQL Server 2012 EXPRESS Db而不是LocalDb。 以下命令運行良好，並且確實使用Blogs和Posts表創建Blogging數據庫。 注意：由於兩款計算機與某些現有應用程序的兼容性問題，我尚未在兩台計算機上都升級到.NET Core 2.0。

PM> Add-Migration myFirstMigration -context BloggingContext
PM> Update-Database -context BloggingContext

問題

但是，當我運行以下命令來生成用戶表（ASPNETUsers，ASPNETRols等）時，該命令運行時沒有任何錯誤，但未創建用戶表。 在我將VS2017升級到版本15.3.3之前沒有發生這種情況。 另外，在我的另一台計算機（帶有SQLEXPRESS 2014的Windows 10）上，我也沒有這樣的問題。 這台計算機是Windows7。這里可能是問題所在，而這里我可能缺少什么？

Update-Database -context BloggingContext

.csproj文件

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
    <PackageTargetFallback>$(PackageTargetFallback);portable-net45+win8+wp8+wpa81;</PackageTargetFallback>
    <UserSecretsId>aspnet-ForgotPassword-B181AA40-BA34-4A36-A650-38857D8E8177</UserSecretsId>
  </PropertyGroup>


  <ItemGroup>
    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.0.0" />
    <PackageReference Include="Microsoft.AspNetCore" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Authentication.Cookies" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="1.1.2" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.3" />
    <PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.2" PrivateAssets="All" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.2" PrivateAssets="All" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="1.1.1" PrivateAssets="All" />
    <PackageReference Include="Microsoft.Extensions.Configuration.UserSecrets" Version="1.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.2" />
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="1.1.1" PrivateAssets="All" />
    <PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.1.2" />
  </ItemGroup>

  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.0.1" />
    <DotNetCliToolReference Include="Microsoft.Extensions.SecretManager.Tools" Version="1.0.1" />
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.1" />
  </ItemGroup>

</Project>

ApplicationDbContextModelShapshot.cs

[DbContext(typeof(ApplicationDbContext))]
partial class ApplicationDbContextModelSnapshot : ModelSnapshot
{
    protected override void BuildModel(ModelBuilder modelBuilder)
    {
        modelBuilder
            .HasAnnotation("ProductVersion", "1.0.0-rc3")
            .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityRole", b =>
            {
                b.Property<string>("Id");

                b.Property<string>("ConcurrencyStamp")
                    .IsConcurrencyToken();

                b.Property<string>("Name")
                    .HasAnnotation("MaxLength", 256);

                b.Property<string>("NormalizedName")
                    .HasAnnotation("MaxLength", 256);

                b.HasKey("Id");

                b.HasIndex("NormalizedName")
                    .HasName("RoleNameIndex");

                b.ToTable("AspNetRoles");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityRoleClaim<string>", b =>
            {
                b.Property<int>("Id")
                    .ValueGeneratedOnAdd();

                b.Property<string>("ClaimType");

                b.Property<string>("ClaimValue");

                b.Property<string>("RoleId")
                    .IsRequired();

                b.HasKey("Id");

                b.HasIndex("RoleId");

                b.ToTable("AspNetRoleClaims");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserClaim<string>", b =>
            {
                b.Property<int>("Id")
                    .ValueGeneratedOnAdd();

                b.Property<string>("ClaimType");

                b.Property<string>("ClaimValue");

                b.Property<string>("UserId")
                    .IsRequired();

                b.HasKey("Id");

                b.HasIndex("UserId");

                b.ToTable("AspNetUserClaims");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserLogin<string>", b =>
            {
                b.Property<string>("LoginProvider");

                b.Property<string>("ProviderKey");

                b.Property<string>("ProviderDisplayName");

                b.Property<string>("UserId")
                    .IsRequired();

                b.HasKey("LoginProvider", "ProviderKey");

                b.HasIndex("UserId");

                b.ToTable("AspNetUserLogins");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserRole<string>", b =>
            {
                b.Property<string>("UserId");

                b.Property<string>("RoleId");

                b.HasKey("UserId", "RoleId");

                b.HasIndex("RoleId");

                b.HasIndex("UserId");

                b.ToTable("AspNetUserRoles");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserToken<string>", b =>
            {
                b.Property<string>("UserId");

                b.Property<string>("LoginProvider");

                b.Property<string>("Name");

                b.Property<string>("Value");

                b.HasKey("UserId", "LoginProvider", "Name");

                b.ToTable("AspNetUserTokens");
            });

        modelBuilder.Entity("ForgotPassword.Models.ApplicationUser", b =>
            {
                b.Property<string>("Id");

                b.Property<int>("AccessFailedCount");

                b.Property<string>("ConcurrencyStamp")
                    .IsConcurrencyToken();

                b.Property<string>("Email")
                    .HasAnnotation("MaxLength", 256);

                b.Property<bool>("EmailConfirmed");

                b.Property<bool>("LockoutEnabled");

                b.Property<DateTimeOffset?>("LockoutEnd");

                b.Property<string>("NormalizedEmail")
                    .HasAnnotation("MaxLength", 256);

                b.Property<string>("NormalizedUserName")
                    .HasAnnotation("MaxLength", 256);

                b.Property<string>("PasswordHash");

                b.Property<string>("PhoneNumber");

                b.Property<bool>("PhoneNumberConfirmed");

                b.Property<string>("SecurityStamp");

                b.Property<bool>("TwoFactorEnabled");

                b.Property<string>("UserName")
                    .HasAnnotation("MaxLength", 256);

                b.HasKey("Id");

                b.HasIndex("NormalizedEmail")
                    .HasName("EmailIndex");

                b.HasIndex("NormalizedUserName")
                    .IsUnique()
                    .HasName("UserNameIndex");

                b.ToTable("AspNetUsers");
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityRoleClaim<string>", b =>
            {
                b.HasOne("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityRole")
                    .WithMany("Claims")
                    .HasForeignKey("RoleId")
                    .OnDelete(DeleteBehavior.Cascade);
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserClaim<string>", b =>
            {
                b.HasOne("ForgotPassword.Models.ApplicationUser")
                    .WithMany("Claims")
                    .HasForeignKey("UserId")
                    .OnDelete(DeleteBehavior.Cascade);
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserLogin<string>", b =>
            {
                b.HasOne("ForgotPassword.Models.ApplicationUser")
                    .WithMany("Logins")
                    .HasForeignKey("UserId")
                    .OnDelete(DeleteBehavior.Cascade);
            });

        modelBuilder.Entity("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityUserRole<string>", b =>
            {
                b.HasOne("Microsoft.AspNetCore.Identity.EntityFrameworkCore.IdentityRole")
                    .WithMany("Users")
                    .HasForeignKey("RoleId")
                    .OnDelete(DeleteBehavior.Cascade);

                b.HasOne("ForgotPassword.Models.ApplicationUser")
                    .WithMany("Roles")
                    .HasForeignKey("UserId")
                    .OnDelete(DeleteBehavior.Cascade);
            });
    }
}

UPDATE

我通過在另一台具有.NET Core 2.0和VS2017 ver 15.3.3計算機上選擇ASP.NET Core 2.0模板來嘗試上述測試，並且一切運行正常，並且使用相同的SQL Server版本SQLEXPRESS2012 。 Blogging Db是使用Blogs和Posts表以及用戶表ASPNETUsers，ASPNETRoles等創建的。因此，問題似乎是當您在使用VS2017 ver 15.3.3系統上具有.NET Core 1.1.1時，並且您正在嘗試創建ASP.NET。帶有Individual User Accounts Core 1.1.1 Web應用ApplicationDbContext無法Individual User Accounts ApplicationDbContext 。

Answer 1

在運行添加遷移和更新數據庫的命令時，您引用的是BloggingContext，並且向我們顯示了ApplicationDbContext的快照。 ApplicationDbContext帶有您選擇的“個人用戶帳戶”模板，因此，如果要使用身份表（用戶表是其中之一），則應擴展ApplicationDbContext而不是創建一個新表。

Answer 2

該解決方案最終使用Visual Studio 2017（使用Microsoft.AspNetCore.All 2.0.5。）對我來說很容易解決。我沒有收到任何錯誤消息，只需要在appsettings.json進行更改appsettings.json 。 我必須將“ Server=(localdb)\\\\mssqllocaldb; ”更改為：“ Server=Localhost; 。 然后，我運行命令“ Update-Database ”，它創建了表。