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ychennay/foreign_key_deferred_attribute.py

Created March 21, 2020 03:39
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ForeignKeyDeferredAttribute example
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foreign_key_deferred_attribute.py
class ForeignKeyDeferredAttribute(DeferredAttribute):
def __set__(self, instance, value):
if instance.__dict__.get(self.field.attname) != value and self.field.is_cached(instance):
self.field.delete_cached_value(instance)
instance.__dict__[self.field.attname] = value
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