Object of type 'QuerySet' is not JSON serializable. Queryset not supporting in function call.

Background task does not work if we pass a queryset inside a method and gives back an error.

user_detail = User.objects.get(id=1)

@background(schedule=datetime.now())
def notify_user(user_detail):
      pass

Object of type ‘QuerySet’ is not JSON serializable.

[philippeowagner]

This is how BGT is designed to work. Just pass the the ID and do the query inside notify_user.

user_id = User.objects.get(id=1)

... 

@background(schedule=datetime.now())
def notify_user(user_id):
      user_detail = User.objects.get(id=user_id)
      ...

[mukulmantosh]

We have serialised JSONs with thousands of IDs in it.

So how it is more efficient that cron job. Is it not that cron is much better for repeating tasks compared to BGT. Can you give a better use case of BGT for repetitive tasks compared to cron.