entity-framework - 未找到与命令 "dotnet-ef"匹配的可执行文件

Question

我正在通过将 ASP.Net Core RC2 与 Microsoft.EntityFramework.Core 和 SQLite 结合使用来制作项目示例。

我已经按照本教程进行操作: https://damienbod.com/2015/08/30/asp-net-5-with-sqlite-and-entity-framework-7/

但是，当我运行此命令时:

dotnet ef migrations add FirstMigration

我收到此错误:

No executable found matching command "dotnet-ef"

这是我的 project.json 配置:

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0-rc2-3002702",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.FileExtensions": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
    "Microsoft.EntityFrameworkCore": "1.0.0-rc2-final",
    "Microsoft.EntityFrameworkCore.Sqlite": "1.0.0-rc2-final"
  },

  "tools": {
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "gcServer": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

Answer 1

Entity Framework Core 1.0

您应该只需要更新 project.json 文件的 tools 部分即可包含以下内容:

"Microsoft.EntityFrameworkCore.Tools": {
  "version": "1.0.0-preview1-final",
  "imports": [
    "portable-net45+win8+dnxcore50",
    "portable-net45+win8"
  ]
}

这应该使 dotnet ef 命令可用。

重要

我还应该注意到，dotnet ef 命令仅在从包含 project.json 文件的同一目录运行它们时才可用。

Entity Framework Core 1.1
如果您在升级到 Entity Framework Core 1.1 后再次遇到此问题，请务必将 Microsoft.EntityFrameworkCore.Tools 依赖项替换为 Microsoft.EntityFrameworkCore.Tools.DotNet 版本 1.1.0-preview4。也无需保留 imports 部分。有关详细信息，请参阅 Entity Framework Core 1.1 release announcement blog post 下的“升级到 1.1”标题。 .