2 from django.db import models
3 from django.forms.models import model_to_dict
4 from django.core.urlresolvers import reverse
5 # This is a no-op if observer_disabled is set to 1 in the config file
8 class PlCoreBase(models.Model):
10 created = models.DateTimeField(auto_now_add=True)
11 updated = models.DateTimeField(auto_now=True)
12 enacted = models.DateTimeField(null=True, default=None)
18 def __init__(self, *args, **kwargs):
19 super(PlCoreBase, self).__init__(*args, **kwargs)
20 self.__initial = self._dict
26 diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
30 def has_changed(self):
31 return bool(self.diff)
34 def changed_fields(self):
35 return self.diff.keys()
37 def get_field_diff(self, field_name):
38 return self.diff.get(field_name, None)
40 def delete(self, *args, **kwds):
41 super(PlCoreBase, self).delete(*args, **kwds)
43 # This is a no-op if observer_disabled is set
44 notify_observer(model=self, delete=True, pk=self.pk)
46 def save(self, *args, **kwargs):
47 super(PlCoreBase, self).save(*args, **kwargs)
49 # This is a no-op if observer_disabled is set
52 self.__initial = self._dict
56 return model_to_dict(self, fields=[field.name for field in