views.py 文件源码

def sort_queryset(self, qs):
        sort_key = self.request.GET.get('sort')
        if sort_key:
            plain_key = sort_key[1:] if sort_key.startswith('-') else sort_key
            reverse = not (plain_key == sort_key)
            if plain_key in self.sortable_fields:
                is_text = False
                with suppress(FieldDoesNotExist):
                    is_text = isinstance(qs.model._meta.get_field(plain_key), CharField)

                if is_text:
                    # TODO: this only sorts direct lookups case insensitively
                    # A sorting field like 'speaker__name' will not be found
                    qs = qs.annotate(key=Lower(plain_key)).order_by('-key' if reverse else 'key')
                else:
                    qs = qs.order_by(sort_key)
        return qs