How to filter results that are not part of a ManyToManyField?

[Neto]

Hello,

I have it model:

class People(models.Model):
    children = models.ManyToManyField('self', blank=True, null=True)

I want to filter the first of each family tree. *Knowing that children can have children

How I do it?

People.objects.filter(????)

[Collin Anderson]

This may look totally crazy, but does this do what you want?

People.objects.filter(people=None)

It may make more sense to do this:

class Person(models.Model):
    children = models.ManyToManyField('self', blank=True, related_name='parents')
Person.objects.filter(parents=None)