Hello django users
I solved the issue, I had to use something like that : (it doesn't show
anymore the error)
@receiver(post_save, sender=mail_items)
def update_count(sender, instance, created, **kwargs):
count_object,created =
mail_item_count.objects.get_or_create(country=instance.Pays_origine)
if not created:
count_object.count = count_object.count + 1
count_object.save()
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