2 from django.db import models
3 from django.forms.models import model_to_dict
5 class PlCoreBase(models.Model):
7 created = models.DateTimeField(auto_now_add=True)
8 updated = models.DateTimeField(auto_now=True)
9 enacted = models.DateTimeField(null=True, default=None)
15 def __init__(self, *args, **kwargs):
16 super(PlCoreBase, self).__init__(*args, **kwargs)
17 self.__initial = self._dict
23 diffs = [(k, (v, d2[k])) for k, v in d1.items() if v != d2[k]]
27 def has_changed(self):
28 return bool(self.diff)
31 def changed_fields(self):
32 return self.diff.keys()
34 def get_field_diff(self, field_name):
35 return self.diff.get(field_name, None)
37 def save(self, *args, **kwargs):
38 super(PlCoreBase, self).save(*args, **kwargs)
39 self.__initial = self._dict
43 return model_to_dict(self, fields=[field.name for field in