migration_template source code

migration_template.rb

      def migration_template(source, destination=nil, config={})
        destination = File.expand_path(destination || source, self.destination_root)

        migration_dir = File.dirname(destination)
        @migration_number     = self.class.next_migration_number(migration_dir)
        @migration_file_name  = File.basename(destination).sub(/\.rb$/, '')
        @migration_class_name = @migration_file_name.camelize

        destination = self.class.migration_exists?(migration_dir, @migration_file_name)

        if !(destination && options[:skip]) && behavior == :invoke
          if destination && options.force?
            remove_file(destination)
          elsif destination
            raise Error, "Another migration is already named #{@migration_file_name}: #{destination}"
          end
          destination = File.join(migration_dir, "#{@migration_number}_#{@migration_file_name}.rb")
        end

        template(source, destination, config)
      end