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defer MapUpdate.changed_geometries by default

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Laura Klünder 2017-11-14 23:45:53 +01:00
parent 57db0621ad
commit 4ab38758eb
1 changed files with 9 additions and 1 deletions
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10
src/c3nav/mapdata/models/update.py
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@ -11,6 +11,11 @@ from django.utils.translation import ugettext_lazy as _
from c3nav.mapdata.tasks import process_map_updates
class MapUpdateManager(models.Manager):
def get_queryset(self, *args, **kwargs):
return super().get_queryset(*args, **kwargs).defer('changed_geometries')
class MapUpdate(models.Model):
"""
A map update. created whenever mapdata is changed.
@ -21,11 +26,14 @@ class MapUpdate(models.Model):
processed = models.BooleanField(default=False)
changed_geometries = models.BinaryField(null=True)
objects = MapUpdateManager()
class Meta:
verbose_name = _('Map update')
verbose_name_plural = _('Map updates')
default_related_name = 'mapupdates'
get_latest_by = 'datetime'
base_manager_name = 'objects'
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
@ -82,7 +90,7 @@ class MapUpdate(models.Model):
@classmethod
def process_updates(cls):
with transaction.atomic():
new_updates = tuple(cls.objects.filter(processed=False).select_for_update(nowait=True))
new_updates = tuple(cls.objects.filter(processed=False).defer(None).select_for_update(nowait=True))
if not new_updates:
return ()