QuerySet, Object has no attribute id - Django

The reason why you are getting the error is because at is a QuerySet ie: a list. You can do something like at[0].id or use get instead of filter to get the at object.

Hope it helps!

this line of code

at = AttachedInfo.objects.filter(attachedMarker=m.id, title=title)

returns a queryset

and you are trying to access a field of it (that does not exist).

what you probably need is

at = AttachedInfo.objects.get(attachedMarker=m.id, title=title)