gistfile1.txt

  desc "Raises an error if there are pending migrations"
  task :abort_if_pending_migrations => :environment do
    if defined? ActiveRecord
      pending_migrations = ActiveRecord::Migrator.new(:up, 'db/migrate').pending_migrations
 
      if pending_migrations.any?
        puts "You have #{pending_migrations.size} pending migrations:"
        pending_migrations.each do |pending_migration|
          puts ' %4d %s' % [pending_migration.version, pending_migration.name]
        end
        abort %{Run "rake db:migrate" to update your database then try again.}
      end
    end
  end