convert_dot_notation_to_hash

# File activerecord/lib/active_record/relation/predicate_builder.rb, line 138
    def convert_dot_notation_to_hash(attributes)
      dot_notation = attributes.select do |k, v|
        k.include?(".".freeze) && !v.is_a?(Hash)
      end

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

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

      attributes
    end