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Notify about the fields that changed

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This allows signal receivers to know specifically what has been changed on the model.
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Gil Forcada Codinachs 2019-10-31 12:02:58 +01:00 committed by Gil Forcada
parent ab40b80fa6
commit a06043a0ce
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1 changed files with 5 additions and 2 deletions
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7
rest_framework/serializers.py
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@ -979,13 +979,16 @@ class ModelSerializer(Serializer):
# relationships as being a special case. During updates we already
# have an instance pk for the relationships to be associated with.
m2m_fields = []
changed_fields = []
for attr, value in validated_data.items():
if attr in info.relations and info.relations[attr].to_many:
m2m_fields.append((attr, value))
else:
setattr(instance, attr, value)
if getattr(instance, attr, None) != value:
setattr(instance, attr, value)
changed_fields.append(attr)
instance.save()
instance.save(update_fields=changed_fields)
# Note that many-to-many fields are set after updating instance.
# Setting m2m fields triggers signals which could potentially change