I\'m using this MSDN Tutorial to run in VS2015 the command PM> Add-Migration MyFirstMigration -context BloggingContext
that ran yesterday successfully but to
I think the answer needs updating in 2017, as MS have made some (breaking) changes that is detailed here.
https://github.com/aspnet/EntityFramework/issues/7053
To summarise, you will now need a reference to EntityFrameWorkCore.Tools.DotNet in the Tools Section as below
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.0.0"
I have also posted a working project.json file below in case some one runs in problems.
{
"dependencies": {
"Microsoft.NETCore.App": {
"version": "1.0.1",
"type": "platform"
},
"Microsoft.AspNetCore.Diagnostics": "1.0.0",
"Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
"Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
"Microsoft.Extensions.Logging.Console": "1.0.0",
"Microsoft.AspNetCore.Razor.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
},
"Microsoft.AspNetCore.StaticFiles": "1.0.0",
"Microsoft.AspNetCore.Mvc": "1.0.1",
"Microsoft.EntityFrameworkCore.SqlServer": "1.0.1",
"Microsoft.Extensions.Configuration.Json": "1.0.1",
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
}
},
"tools": {
"Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
"Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.0.0"
},
"frameworks": {
"netcoreapp1.0": {
"imports": [
"dotnet5.6",
"portable-net45+win8"
]
}
},
"buildOptions": {
"emitEntryPoint": true,
"preserveCompilationContext": true
},
"runtimeOptions": {
"configProperties": {
"System.GC.Server": true
}
},
"publishOptions": {
"include": [
"wwwroot",
"web.config"
]
},
"scripts": {
"postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
}
}
You have to know what is your Entity-Framework
version.
Also after that you have to check project.json
and control these sections:
In Dependencies
check:
Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
},
This section:
"version": "1.0.0-preview2-final",
is related with version of your Entity-Framework
and you have to change this with that.
After that the second section of the proj.json
is here, In the Tools
section of JSON
you have:
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
Also this part of code is related with your Entity-Framework
and last part of code in Dependencies section.
Note: After do this issues you should to close CMD
and restart visual studio.
I had this problem in Visual Studio 2013. I reinstalled NuGet Package Manager:
https://marketplace.visualstudio.com/items?itemName=NuGetTeam.NuGetPackageManagerforVisualStudio2013
I had the same problem and found that it was a Visual Studio versioning problem in the Solution file.
I was targeting:
VisualStudioVersion = 14.0.25123.0
But I needed to target:
VisualStudioVersion = 14.0.25420.1
After making that change directly to the Solution file, EF Core cmdlets started working in the Package Manager Console.
This is what worked for me: From Visual Studio click on
Tools --> NuGet Package Manager --> Package Manager Console
Then you can run Add-Migration
, for example:
Add-Migration InitialCreate
Ensure Microsoft.EntityFrameworkCore.Tools
is referenced in the dependencies
section of your project.json
. NuGet won't load the Package Manager Commands from the tools
section. (See NuGet/Home#3023)
{
"dependencies": {
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
}
}
}