"No executable found matching command "dotnet-ef"" - entity-framework

Question

I am trying to learn the basics of ASP.NET Core using this tutorial:
I have created a ASP.NET Core web application
I have upgraded it using instruction from here
Now, I am trying to setup the database migration using dotnet ef migrations add Initial from command prompt within project's folder (where project.json is located):
No executable found matching command "dotnet-ef"
I have changed project.json, so that dotnet-ef works:
"tools": {
...
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview1-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
Now, the generation fails with the following error:
The specified framework 'Microsoft.NETCore.App', version
'1.0.0-rc2-3002702' was not found.
- Check application dependencies and target a framework version installed at:
C:\Program Files\dotnet\shared\Microsoft.NETCore.App
- The following versions are installed:
1.0.0
1.0.1
1.1.0
- Alternatively, install the framework version '1.0.0-rc2-3002702'
Ok, it makes sense, because Microsoft.EntityFrameworkCore.Tools 1.0.0-preview1-final relies on the old version mentioned in the error, as found in the project.lock.json file.
I don't want to downgrade, so I put the latest version of Microsoft.EntityFrameworkCore.Tools I could find:
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.1.0-preview4-final",
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
},
Doing this will lead to the same error:
No executable found matching command "dotnet-ef"
How can I make it work in version 1.1?
Other context information that might be useful:
OS: Windows 7 x64
VS: 2015 Community Edition
Other parts from project.json:
"frameworks": {
"netcoreapp1.1": {
"imports": [
"portable-net45+win8+dnxcore50",
"portable-net45+win8"
]
}
},
"runtimes": {
"win7-x64": {}
},

Answer 1

UPDATE [30/3/2017]
The new package is
Install-Package Microsoft.EntityFrameworkCore.Tools
ORIGINAL
Try adding
"tools": {
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4"
}
Additionally here is a tutorial on setting up .Net Core 1.1.0 with EF Core 1.1.0
https://learn.microsoft.com/en-us/ef/core/get-started/netcore/new-db-sqlite

Answer 2

Grierson's answer is ok, but for future reference I will include the whole process until I made it work:
1) Tools.DotNet already suggested in the accepted answer
"tools": {
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4"
}
Ran the same command and received:
Cannot execute this command because Microsoft.EntityFrameworkCore.Design is not installed. Install the version of that package that matches the installed version of Microsoft.EntityFrameworkCore and try again.
2) Added
//EF Core
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.1.0-preview4-final",
"type": "build"
}
3) Now, the error is:
No parameterless constructor was found on 'ApplicationDbContext'.
Either add a parameterless constructor to 'Application DbContext' or
add an implementation of 'IDbContextFactory' in
the same assembly as 'ApplicationDbC ontext'.
I have chosen to implement the interface. One possible way:
public ApplicationDbContext Create(DbContextFactoryOptions options)
{
var builder = new DbContextOptionsBuilder<ApplicationDbContext>();
builder.UseSqlServer("Server=(localdb)\\mssqllocaldb;Database=Movies;Trusted_Connection=True;MultipleActiveResultSets=true");
return new ApplicationDbContext(builder.Options);
}
The same error occurs when running dotnet ef migrations add Initial
4) I have added a default constructor for ApplicationDbContext class
Now I can add the migration.

Answer 3

EntityFrameworkCore 1.1.0-preview4-final will work only asp.net core 1.1,if you want to move from core 1.0 to core 1.1,look into https://blogs.msdn.microsoft.com/dotnet/2016/11/16/announcing-net-core-1-1/.

Answer 4

I had the same issue.
that's resolved it for me
"tools": {
"Microsoft.EntityFrameworkCore.Tools": "1.1.0-preview4-final",
"Microsoft.EntityFrameworkCore.Tools.DotNet": "1.1.0-preview4-final"
},

Answer 5

You might miss CliToolReference
<ItemGroup>
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.0.0" />
<DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
</ItemGroup>
check this