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avoid unnecessary queries in ModelInstanceWrapper.save

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Laura Klünder 2017-06-13 23:31:37 +02:00
parent d3ffbd55cd
commit 5b3d6ffbc4
1 changed files with 10 additions and 3 deletions
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13
src/c3nav/editor/wrappers.py
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@ -164,13 +164,20 @@ class ModelInstanceWrapper(BaseWrapper):
if self.pk is None:
self._changeset.add_create(self, author=author)
for field, initial_value in self._initial_values.items():
new_value = getattr(self._obj, field.name)
if field.related_model:
new_value = None if new_value is None else new_value.pk
class_value = getattr(type(self._obj), field.name, None)
if isinstance(class_value, ForwardManyToOneDescriptor):
try:
new_value = getattr(self._obj, class_value.cache_name)
except AttributeError:
new_value = getattr(self._obj, field.attname)
else:
new_value = None if new_value is None else new_value.pk
if new_value != initial_value:
self._changeset.add_update(self, name=field.name, value=new_value, author=author)
continue
new_value = getattr(self._obj, field.name)
if new_value == initial_value:
continue