set_local_assigns!

# File activerecord/lib/rails/generators/active_record/migration/migration_generator.rb, line 17
      def set_local_assigns!
        @migration_template = "migration.rb"
        case file_name
        when /^(add|remove)_.*_(?:to|from)_(.*)/
          @migration_action = $1
          @table_name       = $2.pluralize
        when /join_table/
          if attributes.length == 2
            @migration_action = 'join'
            @join_tables      = attributes.map(&:plural_name)

            set_index_names
          end
        when /^create_(.+)/
          @table_name = $1.pluralize
          @migration_template = "create_table_migration.rb"
        end
      end