def recalculate_abs_length(apps, schema_editor):
"""
Recalculate absolute lengths for all cables with a length and length unit defined. Fixes
incorrectly calculated values as reported under bug #8377.
"""
Cable = apps.get_model('dcim', 'Cable')
cables = Cable.objects.filter(length__isnull=False).exclude(length_unit='')
for cable in cables:
cable._abs_length = to_meters(cable.length, cable.length_unit)
Cable.objects.bulk_update(cables, ['_abs_length'], batch_size=100)
def save(self, *args, **kwargs):
# Store the given length (if any) in meters for use in database ordering
if self.length and self.length_unit:
self._abs_length = to_meters(self.length, self.length_unit)
else:
self._abs_length = None
# Store the parent Device for the A and B terminations (if applicable) to enable filtering
if hasattr(self.termination_a, 'device'):
self._termination_a_device = self.termination_a.device
if hasattr(self.termination_b, 'device'):
self._termination_b_device = self.termination_b.device
super().save(*args, **kwargs)
# Update the private pk used in __str__ in case this is a new object (i.e. just got its pk)
self._pk = self.pk
