+
+class PlCoreBase(models.Model, DiffModelMixIn):
+ objects = PlCoreBaseManager()
+ deleted_objects = PlCoreBaseDeletionManager()
+
+ # default values for created and updated are only there to keep evolution
+ # from failing.
+ created = models.DateTimeField(auto_now_add=True, default=timezone.now)
+ updated = models.DateTimeField(auto_now=True, default=timezone.now)
+ enacted = models.DateTimeField(null=True, default=None)
+ backend_status = models.CharField(max_length=140,
+ default="Provisioning in progress")
+ deleted = models.BooleanField(default=False)
+
+ class Meta:
+ # Changing abstract to False would require the managers of subclasses of
+ # PlCoreBase to be customized individually.
+ abstract = True
+ app_label = "core"
+
+ def __init__(self, *args, **kwargs):
+ super(PlCoreBase, self).__init__(*args, **kwargs)
+ self._initial = self._dict # for DiffModelMixIn
+ self.silent = False
+
+ def can_update(self, user):
+ if user.is_readonly:
+ return False
+ if user.is_admin:
+ return True
+ return False
+
+ def can_update_field(self, user, fieldName):
+ # Give us the opportunity to implement fine-grained permission checking.
+ # Default to True, and let can_update() permit or deny the whole object.
+ return True
+
+ def delete(self, *args, **kwds):
+ # so we have something to give the observer
+ purge = kwds.get('purge',False)
+ silent = kwds.get('silent',False)
+ try:
+ purge = purge or observer_disabled
+ except NameError:
+ pass
+
+ if (purge):
+ del kwds['purge']
+ super(PlCoreBase, self).delete(*args, **kwds)
+ else:
+ self.deleted = True
+ self.enacted=None
+ self.save(update_fields=['enacted','deleted'], silent=silent)
+