-# This is a no-op if observer_disabled is set to 1 in the config file
-from observer import *
-
-class PlCoreBase(models.Model):
-
- created = models.DateTimeField(auto_now_add=True)
- updated = models.DateTimeField(auto_now=True)
- enacted = models.DateTimeField(null=True, default=None)
-
- class Meta:
- abstract = True
- app_label = "core"
+from django.core.urlresolvers import reverse
+from django.forms.models import model_to_dict
+from django.utils import timezone
+from django.core.exceptions import PermissionDenied
+import model_policy
+
+try:
+ # This is a no-op if observer_disabled is set to 1 in the config file
+ from observer import *
+except:
+ print >> sys.stderr, "import of observer failed! printing traceback and disabling observer:"
+ import traceback
+ traceback.print_exc()
+
+ # guard against something failing
+ 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_queryset(self):
+ parent=super(PlCoreBaseDeletionManager, self)
+ if hasattr(parent, "get_queryset"):
+ return parent.get_queryset().filter(deleted=True)
+ else:
+ return parent.get_query_set().filter(deleted=True)
+
+ # deprecated in django 1.7 in favor of get_queryset().
+ def get_query_set(self):
+ return self.get_queryset()
+
+# This manager will be inherited by all subclasses because
+# the core model is abstract.
+class PlCoreBaseManager(models.Manager):
+ def get_queryset(self):
+ parent=super(PlCoreBaseManager, self)
+ if hasattr(parent, "get_queryset"):
+ return parent.get_queryset().filter(deleted=False)
+ else:
+ return parent.get_query_set().filter(deleted=False)
+
+ # deprecated in django 1.7 in favor of get_queryset().
+ def get_query_set(self):
+ return self.get_queryset()
+
+class DiffModelMixIn:
+ # Provides useful methods for computing which objects in a model have
+ # changed. Make sure to do self._initial = self._dict in the __init__
+ # method.
+
+ # This is broken out of PlCoreBase into a Mixin so the User model can
+ # also make use of it.