def async_receiver(signal, task_decorator=task, **kwargs):
    """
    @param task_decorator : By default, uses celery's task decorator. Others, like
    django-celery-transactions' (https://github.com/chrisdoble/django-celery-transactions)
    can be substituted.
    """
    def _decorator(func):
        def _with_task(created_task):
            def _call_async(*args, **kwargs):
                # It's undocumented, but django sends `signal` as a kwarg to receivers.
                # Signals can't be pickled.
                try:
                    del kwargs['signal']
                except KeyError:
                    pass
                new_kwargs = {}
                for key, value in kwargs.items():
                    if isinstance(value, models.Model):
                        new_kwargs[key+'_id'] = value.id
                    elif isinstance(value, (bool, str, int, float)):
                        new_kwargs[key] = value
                return created_task.delay(*args, **new_kwargs)
            signal.connect(_call_async, **kwargs)
            return _call_async
        return _with_task(task_decorator(func))
    return _decorator