- May 26, 2010
- save field change check
- 2 (after 2 ratings)
Used to check if a field of an object has changed.
This is probably most useful in the save method.
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def has_changed(instance, field): if not instance.pk: return False old_value = instance.__class__._default_manager.filter(pk=instance.pk).values(field).get()[field] return not getattr(instance, field) == old_value
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