Question about post_save

[Neto]

I'm using post_save but he is in loop:

@receiver(models.signals.post_save, sender=Cars)

def auto_num_on_save(sender, instance, **kwargs):

    ....my code

    instance.save()

How do I save changes without calling post_save again?

[Johannes Schneider]

Is there any reason why this has to happen after saving? otherwise you
could use pre_save.

bg,
Johannes

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[Collin Anderson]

@receiver(models.signals.post_save, sender=Cars)
def auto_num_on_save(sender, instance, **kwargs):

    if hasattr(instance, '_already_ran'):
        return
    ....my code
    instance._already_ran = True
    instance.save()