demo_app/my_platform/db/migrate/20160321123835_create_navable_visits.your_platform.rb
# This migration comes from your_platform (originally 20160320234842)
class CreateNavableVisits < ActiveRecord::Migration[4.2]
def change
create_table :navable_visits do |t|
t.integer :navable_id
t.string :navable_type
t.integer :group_id
t.timestamps null: false
end
end
end