To make a clone of a model in Django, I can use this trick:
object.pk=None;
object.save();
Assume I have models A, AB, and ABC. AB has a foreign key of A, ABC has a foreign key of AB.
Now if I want to make a deep clone of one A object a, I have to do it like this:
newa = deepcopy(a)
newa.pk=None
newa.save()
ab = AB.objects.get(a=a)
newab = deepcopy(ab)
newab.a = newa;
newab.pk=None
newab.save()
abc = ABC.objects.get(ab=ab)
abc.pk=None;
abc.ab=newab;
abc.save()
This is a lot of trouble if there are multiple levels of relationship. Is there a convenient way to do this, like DELETE CASCADE in sql, only for clone?
