def save(self, *args, **kwargs):
# if I'm modifyed and not created
if Recommendation.objects.filter(pk=self.pk):
clean_all_trends()
super(Recommendation, self).save(*args, **kwargs)
def save(self, *args, **kwargs):
# if I'm modifyed and not created
if Proposal.objects.filter(id=self.id):
clean_all_trends()
super(Proposal, self).save(*args, **kwargs)