demo_app/my_platform/db/migrate/20150523130534_add_responsible_admin_id_to_issues.your_platform.rb
# This migration comes from your_platform (originally 20150523130511)
class AddResponsibleAdminIdToIssues < ActiveRecord::Migration[4.2]
def change
add_column :issues, :responsible_admin_id, :integer
end
end