+import datetime
import os
from django.db import models
from django.forms.models import model_to_dict
-# This is a no-op if observer_disabled is set to 1 in the config file
-from observer import *
+from django.core.urlresolvers import reverse
+from django.forms.models import model_to_dict
+
+try:
+ # This is a no-op if observer_disabled is set to 1 in the config file
+ from observer import *
+except:
+ print "import of observer failed! printing traceback and disabling observer:"
+ import traceback
+ traceback.print_exc()
+
+ # guard against something failing
+ def notify_observer(*args, **kwargs):
+ pass
class PlCoreBase(models.Model):
- created = models.DateTimeField(auto_now_add=True)
- updated = models.DateTimeField(auto_now=True)
+ # 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)
class Meta:
def get_field_diff(self, field_name):
return self.diff.get(field_name, None)
+ def can_update(self, user):
+ if user.is_readonly:
+ return False
+ if user.is_admin:
+ return True
+ return False
+
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)
+
super(PlCoreBase, self).delete(*args, **kwds)
# This is a no-op if observer_disabled is set
- notify_observer(model=self, delete=True)
+ notify_observer(model=self, delete=True, pk=pk, model_dict=model_dict)
def save(self, *args, **kwargs):
super(PlCoreBase, self).save(*args, **kwargs)
self.__initial = self._dict
+ def save_by_user(self, user, *args, **kwds):
+ if self.can_update(user):
+ self.save(*args, **kwds)
+
+ def delete_by_user(self, user, *args, **kwds):
+ if self.can_update(user):
+ self.delete(*args, **kwds)
+
@property
def _dict(self):
return model_to_dict(self, fields=[field.name for field in