convert_dot_notation_to_hash

# File activerecord/lib/active_record/relation/predicate_builder.rb, line 149
      def convert_dot_notation_to_hash(attributes)
        dot_notation = attributes.select do |k, v|
          k.include?(".") && !v.is_a?(Hash)
        end

        dot_notation.each_key do |key|
          table_name, column_name = key.split(".")
          value = attributes.delete(key)
          attributes[table_name] ||= {}

          attributes[table_name] = attributes[table_name].merge(column_name => value)
        end

        attributes
      end