dotnet ef not working in VS 2017

Steps to reproduce

• Install VS 2017 RC
• Create brand new web application with authentication
• Add the require dependencies for migration builder
• Open the package manager console and type dotnet ef

The issue

So I upgraded to Visual Studio 2017 and generated a new .net core web application with docker support. I am trying to create a new migration and getting an error about not finding an executable. When I installed 2017 I did check to install .NET core.

I went to look for the project.json file but there is none. I added a nuget package and I still cannot get it to generate a migration file for me.

“Microsoft.EntityFrameworkCore.Design”

If you are seeing an exception, include the full exceptions details (message and stack trace).

Exception message:
Stack trace:
PM> dotnet ef
dotnet : No executable found matching command "dotnet-ef"
At line:1 char:1
+ dotnet ef
+ ~~~~~~~~~
    + CategoryInfo          : NotSpecified: (No executable f...and "dotnet-ef":String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 

Further technical details

Operating system: Windows 10 Visual Studio version: (e.g. VS 2013 or n/a) VS 2017

[cdie]

@jrock2004 Look at this post https://blogs.msdn.microsoft.com/dotnet/2016/11/16/announcing-entity-framework-core-1-1/

Have you done this command PM> Install-Package Microsoft.EntityFrameworkCore.Tools.DotNet -Version 1.0.0-msbuild1-final -Pre

[WouterDeKort]

I’m trying to get this to work on VS2017 RC after upgrading my project. I’ve updated all packages and used Install-Package Microsoft.EntityFrameworkCore.Tools -Pre for tooling.

Now whenever I run Update-Database from the PowerShell Package Manager Console I get the following error:

PM> Update-Database dotnet exec needs a managed .dll or .exe extension. The application specified was ‘C:.…\bin\Debug\netcoreapp1.0<app>.runtimeconfig.json’ Process finished with non-zero exit code

Any idea what I have to do?