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introducing NoopChangedObject for performance optimization where applicable

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Laura Klünder 2019-12-10 14:12:14 +01:00
parent 35220eaef6
commit a49fed2b20
3 changed files with 13 additions and 3 deletions
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7
src/c3nav/editor/models/changeset.py
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@ -17,7 +17,7 @@ from django.utils.timezone import make_naive
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import ungettext_lazy
from c3nav.editor.models.changedobject import ApplyToInstanceError, ChangedObject
from c3nav.editor.models.changedobject import ApplyToInstanceError, ChangedObject, NoopChangedObject
from c3nav.editor.tasks import send_changeset_proposed_notification
from c3nav.editor.wrappers import ModelInstanceWrapper, ModelWrapper, is_created_pk
from c3nav.mapdata.models import LocationSlug, MapUpdate
@ -374,7 +374,7 @@ class ChangeSet(models.Model):
r = tuple((pk, values[name]) for pk, values in self.updated_existing.get(model, {}).items() if name in values)
return r
def get_changed_object(self, obj) -> ChangedObject:
def get_changed_object(self, obj, allow_noop=False) -> typing.Union[ChangedObject, typing.Type[NoopChangedObject]]:
if isinstance(obj, ModelInstanceWrapper):
obj = obj._obj
model = obj.__class__
@ -394,6 +394,9 @@ class ChangeSet(models.Model):
if is_created_pk(pk):
raise model.DoesNotExist
if allow_noop:
return NoopChangedObject
return ChangedObject(changeset=self, model_class=model, existing_object_pk=pk)
def get_created_object(self, model, pk, get_foreign_objects=False, allow_deleted=False):