Mvc-ef Migration

[cevarief]

Hi, it's me again.

Does it work to create migration dotnet ef migrations add Init using mvc-ef sample ?

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
---> System.ArgumentNullException: Value cannot be null.
Parameter name: assemblyName
   at System.Reflection.AssemblyName..ctor(String assemblyName)

[kerryjiang]

Do you mean automatic migration?

From the sample of ASP.NET Identity, there might be one piece of code required:

using (var serviceScope = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>()
                        .CreateScope())
{
            serviceScope.ServiceProvider.GetService<ApplicationDbContext>()
                             .Database.Migrate();
 }

[cevarief]

I mean code first migrations using ef tools.

"tools": {
    "dotnet-ef": {
      "version": "1.0.0-*",
      "imports": [
        "portable-net45+wp80+win8+wpa81+dnxcore50",
        "portable-net45+win8+wp8+wpa81",
        "portable-net45+win8+wp8"
      ]
    }
  },
...

[kerryjiang]

I think you need pass in the connectionString somewhere then the tool can compare the db schema.
The DbContext in .net core doesn't bind a connection string in configuration like .NET does.

[cevarief]

It's now using Microsoft.EntityFrameworkCore.Tools. EF Issue