def query_parent_objects(self, context, query=None):
        """Return the objects of the same type from the parent object

        :param query: Catalog query to narrow down the objects
        :type query: dict
        :returns: Content objects of the same portal type in the parent
        """

        # return the object values if we have no catalog query
        if query is None:
            return self.get_parent_objects(context)

        # avoid undefined reference of catalog in except...
        catalog = None

        # try to fetch the results via the catalog
        try:
            catalogs = api.get_catalogs_for(context)
            catalog = catalogs[0]
            return map(api.get_object, catalog(query))
        except (IndexError, UnicodeDecodeError, ParseError, APIError) as e:
            # fall back to the object values of the parent
            logger.warn("UniqueFieldValidator: Catalog query {} failed "
                        "for catalog {} ({}) -> returning object values of {}"
                        .format(query, repr(catalog), str(e),
                                repr(api.get_parent(context))))
            return self.get_parent_objects(context)
Return the objects of the same type from the parent object

        :param query: Catalog query to narrow down the objects
        :type query: dict
        :returns: Content objects of the same portal type in the parent