13 lines
404 B
Python
13 lines
404 B
Python
from django.db.models.signals import m2m_changed
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from django.dispatch import receiver
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from django.utils.timezone import now
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from games.models import Purchase
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@receiver(m2m_changed, sender=Purchase.games.through)
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def update_num_purchases(sender, instance, **kwargs):
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instance.num_purchases = instance.games.count()
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instance.updated_at = now()
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instance.save(update_fields=["num_purchases"])
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