method_missing

# File activerecord/lib/active_record/relation.rb, line 354
    def method_missing(method, *args, &block)
      if Array.method_defined?(method)
        to_a.send(method, *args, &block)
      elsif @klass.scopes[method]
        merge(@klass.send(method, *args, &block))
      elsif @klass.respond_to?(method)
        scoping { @klass.send(method, *args, &block) }
      elsif arel.respond_to?(method)
        arel.send(method, *args, &block)
      elsif match = DynamicFinderMatch.match(method)
        attributes = match.attribute_names
        super unless @klass.send(:all_attributes_exists?, attributes)

        if match.finder?
          find_by_attributes(match, attributes, *args)
        elsif match.instantiator?
          find_or_instantiator_by_attributes(match, attributes, *args, &block)
        end
      else
        super
      end
    end