cant add migration to ef 7 - entity-framework

Question

I am still in the process of porting my old MVC project to the latest asp.net 5 MVC and EntityFramework 7. To accomplish this I first reverse engineered an existing database from the old project using the ef commands. That created all of my model classes correctly (or mostly so). I have manually edited the code to get through all of the initial errors. I have that compiling with almost no additional code from the original project. In other words I only have the model classes, and the DbContext class so far in the solution. All of this is in an assembly and I have no migrations at all in the codebase, just the Migrations directory. What I thought would make sense is to add a migration to baseline the database from what was reverse engineered. I should mention that my DbContext inherits from IdentityDbContext
public partial class STOrmContext : IdentityDbContext<ApplicationUser>
{
}
My project is split into two components. All database and models in an assembly, and MVC stuff in a separate project.
when I type
dnx ef command migrations add Initial
I get the following error message
The entity type 'Microsoft.AspNet.Identity.EntityFramework.IdentityUserLogin<string>' requires a key to be defined.
I guess I just don't really understand how to bootstrap a legacy database into EntintyFramework 7. Can someone point me in the right direction.

Answer 1

I found the answer myself.
It turns out it was a couple of things I was not addressing.
When I reverse engineered the old database it created models for the
identity stuff from the legacy application.
I deleted those.
I also needed to call the base OnModelCreating() so that it could configure
Identity stuff.
protected override void OnModelCreating(ModelBuilder modelBuilder) {
base.OnModelCreating(modelBuilder);
}
I guess I should have paid more attention to what was really happening before jumping to a question on StackOverflow