demo_app/my_platform/db/migrate/20150325105858_create_flags.your_platform.rb
# This migration comes from your_platform (originally 20120811140509)
class CreateFlags < ActiveRecord::Migration[4.2]
def change
create_table :flags do |t|
t.string :key
t.integer :flagable_id
t.string :flagable_type
t.timestamps
end
end
end