2 from django.db import models
3 from django.forms.models import model_to_dict
4 from observer.event_manager import EventSender
7 class PlCoreBase(models.Model):
9 created = models.DateTimeField(auto_now_add=True)
10 updated = models.DateTimeField(auto_now=True)
11 enacted = models.DateTimeField(null=True, default=None)
17 def __init__(self, *args, **kwargs):
18 super(PlCoreBase, self).__init__(*args, **kwargs)
19 self.__initial = self._dict
25 diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
29 def has_changed(self):
30 return bool(self.diff)
33 def changed_fields(self):
34 return self.diff.keys()
36 def get_field_diff(self, field_name):
37 return self.diff.get(field_name, None)
39 def delete(self, *args, **kwds):
40 super(PlCoreBase, self).delete(*args, **kwds)
42 EventSender().fire({'delete_flag':True,'model':self.__name__})
44 def save(self, *args, **kwargs):
45 super(PlCoreBase, self).save(*args, **kwargs)
47 # Tell the observer that the source database has been updated
50 self.__initial = self._dict
54 return model_to_dict(self, fields=[field.name for field in