demo_app/my_platform/db/migrate/20170608210328_create_beta_invitations.your_platform.rb
# This migration comes from your_platform (originally 20170608142111)
class CreateBetaInvitations < ActiveRecord::Migration[4.2]
def change
create_table :beta_invitations do |t|
t.integer :beta_id
t.integer :inviter_id
t.integer :invitee_id
t.timestamps null: false
end
end
end