我正在做一个项目示例使用ASP.Net核心RC2与Microsoft.EntityFramework.Core和sqlite。
我遵循这个教程：
https://damienbod.com/2015/08/30/asp-net-5-with-sqlite-and-entity-framework-7/
但是，当我运行这个命令：
dotnet ef migrations add FirstMigration
我得到这个错误：
No executable found matching command "dotnet-ef"
这里是我的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%" ]
}
}
解决方法
您应该只需要更新project.json文件的工具部分，包括：
"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，dotnet ef命令只有在从包含project.json文件的同一目录运行它们时才可用。
实体框架核心1.1
如果您在升级到Entity Framework Core 1.1后再次遇到此问题，请务必使用Microsoft.EntityFrameworkCore.Tools.DotNet版本1.1.0-preview4替换Microsoft.EntityFrameworkCore.Tools依赖项。也不需要保留导入部分。有关此的详细信息，请参阅Entity Framework Core 1.1 release announcement blog post下的“升级到1.1”标题。
