never_cache didn't receive an HttpRequest. If you are decorating a classmethod, be sure to use @method_decorator.

Raise code

che(view_func):
    """
    Decorator that adds headers to a response so that it will never be cached.
    """
    @wraps(view_func)
    def _wrapped_view_func(request, *args, **kwargs):
        if not isinstance(request, HttpRequest):
            raise TypeError(
                "never_cache didn't receive an HttpRequest. If you are "
                "decorating a classmethod, be sure to use @method_decorator."
            )
        response = view_func(request, *args, **kwargs)
        add_never_cache_headers(response)
        return response
    return _wrapped_view_func