code: def _field_lookups(model, status=None):
      
      # Import models here to avoid circular import fail.
      from faq.models import Topic, Question
  
      field_lookups = {}
  
      if model == Topic:
          field_lookups['sites__pk'] = settings.SITE_ID
  
      if model == Question:
          field_lookups['topic__sites__pk'] = settings.SITE_ID
          if status:
              field_lookups['topic__status'] = status
  
      # Both Topic & Question have a status field.
      if status:
          field_lookups['status'] = status
  
      return field_lookups
docs: Abstraction of field lookups for managers.
  
      Returns a dictionary of field lookups for a queryset. The lookups
      will always filter by site. Optionally, if ``status`` is passed to
      the function the objects will also be filtered by the given status.
  
      This function saves from having to make two different on-site and
      published Managers each for `Topic` and `Question`, and having to move
      Managers out of the `FAQBase` model and into each of the `Topic`
      and `Question` models.