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honor post_save's update_fields and only fire the source_saved signal when needed

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This commit is contained in:
Hannes Tismer 2016-10-24 16:21:53 +02:00
parent 6457cf0c55
commit f1f295e054
1 changed files with 4 additions and 1 deletions
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5
imagekit/specs/sourcegroups.py
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@ -87,12 +87,15 @@ class ModelSignalRouter(object):
if isinstance(instance, src.model_class))
@ik_model_receiver
def post_save_receiver(self, sender, instance=None, created=False, raw=False, **kwargs):
def post_save_receiver(self, sender, instance=None, created=False, update_fields=None, raw=False, **kwargs):
if not raw:
self.init_instance(instance)
old_hashes = instance._ik.get('source_hashes', {}).copy()
new_hashes = self.update_source_hashes(instance)
for attname in self.get_source_fields(instance):
if update_fields and attname not in update_fields:
continue
file = getattr(instance, attname)
if file and old_hashes.get(attname) != new_hashes[attname]:
self.dispatch_signal(source_saved, file, sender, instance,