Rails generate model + migration for subclass

I have a base model MyAppRecordBase which inherits from
ActiveRecord::Base and which all other models inherit from.

I used (in config/environments/development.rb)
config.generators.active_record[:parent] = ‘MyAppRecordBase’ to make it

How do I make rails generate model XYZ to create a migration
file for new models (it do all exept creating migration file…)?