Creating Roles in Asp.net Identity MVC 5

Question

There is very little documentation about using the new Asp.net Identity Security Framework.

I have pieced together what I could to try and create a new Role and add a User to it. I tried the following: Add role in ASP.NET Identity

which looks like it may have gotten the info from this blog: building a simple to-do application with asp.net identity and associating users with to-does

I have added the code to a Database Initializer that is run whenever the model changes. It fails on the RoleExists function with the following error:

System.InvalidOperationException occurred in mscorlib.dll The entity type IdentityRole is not part of the model for the current context.

protected override void Seed (MyContext context)
{
    var UserManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context)); 
    var RoleManager = new RoleManager<IdentityRole>(new RoleStore<IdentityRole>(context));

    // Create Admin Role
    string roleName = "Admins";
    IdentityResult roleResult;

    // Check to see if Role Exists, if not create it
    if (!RoleManager.RoleExists(roleName))
    {
        roleResult = RoleManager.Create(new IdentityRole(roleName));
    }
}

Any help is appreciated.

Answer 1

Verify you have following signature of your MyContext class

public class MyContext : IdentityDbContext<MyUser>

Or

public class MyContext : IdentityDbContext

The code is working for me, without any modification!!!