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我有一个新的 asp.net core 2.0 项目，我试图通过迁移方式将我的数据库上下文存储到数据库中，现在我已经通过 NuGet 安装了应该存在的依赖项。

这是我的 DBContext

public  class SolitudeDBContext : DbContext
{
    public SolitudeDBContext(DbContextOptions options) : base(options) { }
    public virtual DbSet<OrderHeader> OrderHeader { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

        modelBuilder.HasDefaultSchema(schema: SchemaName.Portal);

        base.OnModelCreating(modelBuilder);
    }

    public override int SaveChanges()
    {        
        return base.SaveChanges();
    }
}

我存储默认连接的应用程序设置。

 {
  "ConnectionStrings": {
    "DefaultConnection": "Server=DESKTOP-JHIMUM4\\SQLEXPRESS2014;Database=solitude;Trusted_Connection=True;MultipleActiveResultSets=true"
  },

"Logging": {
  "IncludeScopes": false,
  "LogLevel": {
    "Default": "Warning"
  }
}
}

我一直在使用

PM> dotnet ef 迁移添加 firstDatabase

但是，即使您可以看到参考也安装在模型中，也会引发以下错误，我也修复了项目组。dotnet : No executable found matching command "dotnet-ef" At line:1 char:1 + dotnet ef migrations add firstDatabase + ~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~ + CategoryInfo : NotSpecified: (No executable f...and "dotnet-ef":String) [], RemoteException + FullyQualifiedErrorId : NativeCommandError

我的项目文件

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

  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.0.0" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
  </ItemGroup>

  <ItemGroup>
    <Folder Include="Models\products\" />
    <Folder Include="Models\stock\" />
  </ItemGroup>

</Project>

第二次编辑后的项目：

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

  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.0" />
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
  </ItemGroup>


  <ItemGroup>
    <Folder Include="Models\products\" />
    <Folder Include="Models\stock\" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.0" />
  </ItemGroup>

</Project>
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1 回答 1

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您需要添加Microsoft.EntityFrameworkCore.Tools.DotNet为 aDotNetCliToolReference而不是包引用。这将使dotnet-ef命令可用：

<ItemGroup>
    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
</ItemGroup>
于 2017-10-07T18:34:34.277 回答