# File lib/generators/active_record/devise_generator.rb, line 13 def copy_devise_migration if (behavior == :invoke && model_exists?) || (behavior == :revoke && migration_exists?(table_name)) migration_template "migration_existing.rb", "db/migrate/add_devise_to_#{table_name}" else migration_template "migration.rb", "db/migrate/devise_create_#{table_name}" end end