找不到可执行文件匹配命令“dotnet-ef”（软件包管理器）

Question

我正在制作.Net Core上的教程，我无法使用软件包管理器控制台。

我对这个Link

使本教程中，当我在包管理器控制台写插件迁移或更新DATEBASE（例）：

DOTNET EF miggrations添加耶尼

事实证明这错误：

dotnet : No executable found matching command "dotnet-ef" 
At line:1 char:1 
+ dotnet ef miggrations add Yeni 
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : NotSpecified: (No executable f...and "dotnet-ef":String) [], RemoteException 
    + FullyQualifiedErrorId : NativeCommandError 

我可以更新我的数据库，还是可以在包管理器控制台上添加新的迁移？如何 ？

这里是我的projects.json

{ 
    "userSecretsId": "aspnet-WebApplication6-6e4c4aee-6cd6-4565-b603-7b4517839d9c", 

    "dependencies": { 
    "Microsoft.NETCore.App": { 
     "version": "1.0.0", 
     "type": "platform" 
    }, 
    "Microsoft.ApplicationInsights.AspNetCore": "1.0.0", 
    "Microsoft.AspNetCore.Authentication.Cookies": "1.0.0", 
    "Microsoft.AspNetCore.Diagnostics": "1.0.0", 
    "Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore": "1.0.0", 
    "Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.0.0", 
    "Microsoft.AspNetCore.Mvc": "1.0.0", 
    "Microsoft.AspNetCore.Razor.Tools": { 
     "version": "1.0.0-preview2-final", 
     "type": "build" 
    }, 
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0", 
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0", 
    "Microsoft.AspNetCore.StaticFiles": "1.0.0", 
    "Microsoft.EntityFrameworkCore.SqlServer": "1.0.0", 
    "Microsoft.EntityFrameworkCore.SqlServer.Design": { 
     "version": "1.0.0", 
     "type": "build" 
    }, 
    "Microsoft.EntityFrameworkCore.Tools": { 
     "version": "1.0.0-preview2-final", 
     "type": "build" 
    }, 
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0", 
    "Microsoft.Extensions.Configuration.Json": "1.0.0", 
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0", 
    "Microsoft.Extensions.Logging": "1.0.0", 
    "Microsoft.Extensions.Logging.Console": "1.0.0", 
    "Microsoft.Extensions.Logging.Debug": "1.0.0", 
    "Microsoft.Extensions.Options.ConfigurationExtensions": "1.0.0", 
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0", 
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": { 
     "version": "1.0.0-preview2-final", 
     "type": "build" 
    }, 
    "Microsoft.VisualStudio.Web.CodeGenerators.Mvc": { 
     "version": "1.0.0-preview2-final", 
     "type": "build" 
    } 
    }, 

    "tools": { 
    "BundlerMinifier.Core": "2.0.238", 
    "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final", 
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final", 
    "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final", 
    "Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final", 
    "Microsoft.VisualStudio.Web.CodeGeneration.Tools": { 
     "version": "1.0.0-preview2-final", 
     "imports": [ 
     "portable-net45+win8" 
     ] 
    } 
    }, 

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

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

    "runtimeOptions": { 
    "configProperties": { 
     "System.GC.Server": true 
    } 
    }, 

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

    "scripts": { 
    "prepublish": [ "bower install", "dotnet bundle" ], 
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ] 
    } 
} 

谢谢

Answer 1

包管理器控制台不支持 “全局命令” 呢。它只能在项目文件夹（包含project.json的文件夹）中理解“dotnet-ef”。

所以，你可以尝试以下操作之一：

1. 尝试改变PMC的当前目录到 project.json所在的文件夹。 （默认情况下，它指向解决方案的根目录 文件夹，而不是项目。）

2. 使用powershell运行该命令。