Merge MyDbContext with IdentityDbContext

Question

I have a MyDbContext in a separated Data Accass Layer class library project. And I have an ASP.NET MVC 5 project with a default IdentityDbContext. The two context use the sa

Answer 1

You may get the following message if you follow the above steps but can't work out how to provide the key information. The error you may receive is:

IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType. Context.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.

Create the two following classes

public class IdentityUserLoginConfiguration : EntityTypeConfiguration
{

    public IdentityUserLoginConfiguration()
    {
        HasKey(iul => iul.UserId);
    }

}

public class IdentityUserRoleConfiguration : EntityTypeConfiguration
{

    public IdentityUserRoleConfiguration()
    {
        HasKey(iur => iur.RoleId);
    }

}

In the OnModelCreating method within your Applications DbContext add the two configurations outlined above to the model:

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {

        modelBuilder.Configurations.Add(new IdentityUserLoginConfiguration());
        modelBuilder.Configurations.Add(new IdentityUserRoleConfiguration());

    }

This should now get rid of the error methods when your model is being created. It did for me.