2 from django.db import models
3 from django.forms.models import model_to_dict
4 from django.core.urlresolvers import reverse
5 from django.forms.models import model_to_dict
6 # This is a no-op if observer_disabled is set to 1 in the config file
9 class PlCoreBase(models.Model):
11 created = models.DateTimeField(auto_now_add=True)
12 updated = models.DateTimeField(auto_now=True)
13 enacted = models.DateTimeField(null=True, default=None)
19 def __init__(self, *args, **kwargs):
20 super(PlCoreBase, self).__init__(*args, **kwargs)
21 self.__initial = self._dict
27 diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
31 def has_changed(self):
32 return bool(self.diff)
35 def changed_fields(self):
36 return self.diff.keys()
38 def get_field_diff(self, field_name):
39 return self.diff.get(field_name, None)
41 def can_update(self, user):
48 def delete(self, *args, **kwds):
49 # so we have something to give the observer
51 model_dict = model_to_dict(self)
52 for (k,v) in model_dict.items():
53 # things like datetime are not JSON serializable
54 model_dict[k] = str(v)
56 super(PlCoreBase, self).delete(*args, **kwds)
58 # This is a no-op if observer_disabled is set
59 notify_observer(model=self, delete=True, pk=pk, model_dict=model_dict)
61 def save(self, *args, **kwargs):
62 super(PlCoreBase, self).save(*args, **kwargs)
64 # This is a no-op if observer_disabled is set
67 self.__initial = self._dict
69 def save_by_user(self, user, *args, **kwds):
70 if self.can_update(user):
71 self.save(*args, **kwds)
73 def delete_by_user(self, user, *args, **kwds):
74 if self.can_update(user):
75 self.delete(*args, **kwds)
79 return model_to_dict(self, fields=[field.name for field in