import os
from django.db import models
from django.forms.models import model_to_dict
-from observer.event_manager import EventSender
-
-
-class PlCoreBase(models.Model):
-
- created = models.DateTimeField(auto_now_add=True)
- updated = models.DateTimeField(auto_now=True)
-
- class Meta:
- abstract = True
- app_label = "core"
-
- def __init__(self, *args, **kwargs):
- super(PlCoreBase, self).__init__(*args, **kwargs)
- self.__initial = self._dict
-
- @property
- def diff(self):
- d1 = self.__initial
- d2 = self._dict
- diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
- return dict(diffs)
-
- @property
- def has_changed(self):
- return bool(self.diff)
-
- @property
- def changed_fields(self):
- return self.diff.keys()
-
- def get_field_diff(self, field_name):
- return self.diff.get(field_name, None)
-
- def delete(self, *args, **kwds):
- super(PlCoreBase, self).delete(*args, **kwds)
+from django.core.urlresolvers import reverse
+from django.forms.models import model_to_dict
- EventSender().fire({'delete_flag':True,'model':self.__name__})
+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()
- def save(self, *args, **kwargs):
- super(PlCoreBase, self).save(*args, **kwargs)
-
- # Tell the observer that the source database has been updated
- EventSender().fire()
+ # guard against something failing
+ def notify_observer():
+ pass
- self.__initial = self._dict
+class PlCoreBase(models.Model):
- @property
- def _dict(self):
- return model_to_dict(self, fields=[field.name for field in
- self._meta.fields])
+ 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"
+
+ def __init__(self, *args, **kwargs):
+ super(PlCoreBase, self).__init__(*args, **kwargs)
+ self.__initial = self._dict
+
+ @property
+ def diff(self):
+ d1 = self.__initial
+ d2 = self._dict
+ diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
+ return dict(diffs)
+
+ @property
+ def has_changed(self):
+ return bool(self.diff)
+
+ @property
+ def changed_fields(self):
+ return self.diff.keys()
+
+ 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, 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()
+
+ 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
+ self._meta.fields])