module ActiveRecord
  module AttributeMethods
    module Query
      extend ActiveSupport::Concern

      included do
        attribute_method_suffix "?"
      end

      def query_attribute(attr_name)
        _attributes.has?(attr_name)
      end

      private
        # Handle *? for method_missing.
        def attribute?(attribute_name)
          query_attribute(attribute_name)
        end
    end
  end
end