def notify_observer(*args, **kwargs):
pass
+# This manager will be inherited by all subclasses because
+# the core model is abstract.
+class PlCoreBaseDeletionManager(models.Manager):
+ def get_query_set(self):
+ return super(PlCoreBaseDeletionManager, self).get_query_set().filter(deleted=True)
+
+# This manager will be inherited by all subclasses because
+# the core model is abstract.
class PlCoreBaseManager(models.Manager):
def get_query_set(self):
return super(PlCoreBaseManager, self).get_query_set().filter(deleted=False)
- # default values for created and updated are only there to keep evolution
- # from failing.
class PlCoreBase(models.Model):
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=datetime.datetime.now())
updated = models.DateTimeField(auto_now=True, default=datetime.datetime.now())
enacted = models.DateTimeField(null=True, default=None)
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 delete(self, *args, **kwds):
# so we have something to give the observer
- pk = self.pk
- model_dict = model_to_dict(self)
- for (k,v) in model_dict.items():
- # things like datetime are not JSON serializable
- model_dict[k] = str(v)
+ purge = kwds.get('purge',False)
+ try:
+ purge = purge or observer_disabled
+ except NameError:
+ pass
+
+ if (purge):
+ super(PlCoreBase, self).delete(*args, **kwds)
+ else:
+ self.deleted = True
+ self.enacted=None
+ self.save(update_fields=['enacted','deleted'])
- super(PlCoreBase, self).delete(*args, **kwds)
-
- # This is a no-op if observer_disabled is set
- notify_observer(model=self, delete=True, pk=pk, model_dict=model_dict)
def save(self, *args, **kwargs):
super(PlCoreBase, self).save(*args, **kwargs)
-
+
# This is a no-op if observer_disabled is set
notify_observer()