demo_app/my_platform/db/migrate/20170628195622_rename_column_path_to_url_path_in_permalinks.your_platform.rb
# This migration comes from your_platform (originally 20170628194710)
class RenameColumnPathToUrlPathInPermalinks < ActiveRecord::Migration[4.2]
def change
rename_column :permalinks, :path, :url_path
end
end