demo_app/my_platform/db/migrate/20150325105863_create_status_group_membership_infos.your_platform.rb
# This migration comes from your_platform (originally 20130208215253)
class CreateStatusGroupMembershipInfos < ActiveRecord::Migration[4.2]
def change
create_table :status_group_membership_infos do |t|
t.integer :membership_id
t.integer :promoted_by_workflow_id
t.integer :promoted_on_event_id
t.timestamps
end
end
end