def item_author_link(self, item):
        """
        Return the author's URL.
        Should not be called if self.item_author_name has returned None.
        """
        try:
            author_url = self.item_author.get_absolute_url()
            return self.site_url + author_url
        except NoReverseMatch:
            return self.site_url
Return the author's URL.
        Should not be called if self.item_author_name has returned None.