'Return a sequence containing the fields to be displayed as links
on the changelist. The list_display parameter is the list of fields
returned by get_list_display().'

def get_list_display_links(self, request, list_display):

    if (self.list_display_links or (not list_display)):
        return self.list_display_links
    else:
        return list(list_display)[:1]
