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16 lines
634 B
Python
16 lines
634 B
Python
from django.core.cache import cache
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from django.db.models.signals import m2m_changed
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from django.dispatch import receiver
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from core.models import User
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@receiver(m2m_changed, sender=User.groups.through, dispatch_uid="user_groups_changed")
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def user_groups_changed(sender, instance: User, **kwargs):
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"""Clear the cached groups of the user."""
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# As a m2m relationship doesn't live within the model
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# but rather on an intermediary table, there is no
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# model method to override, meaning we must use
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# a signal to invalidate the cache when a user is removed from a group
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cache.delete(f"user_{instance.pk}_groups")
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