Attribute error with custom model attribute

Question

in order to check if a field has changed, I added an attribute to my model, as explained here:

class Person(models.Model):
  name = models.CharField()

  __original_name = None

  def __init__(self, *args, **kwargs):
    super(Person, self).__init__(*args, **kwargs)
    self.__original_name = self.name

  def save(self, force_insert=False, force_update=False, *args, **kwargs):
    if self.name != self.__original_name:
      # name changed - do something here

    super(Person, self).save(force_insert, force_update, *args, **kwargs)
    self.__original_name = self.name

I already had instances of this model (without the __original_name attribute), and when I want to modify and save one, I get

'Person' object has no attribute '__original_name'

Anybody can help?

Could you post the full traceback? – David Robinson Dec 06 '12 at 18:00 — David Robinson, Dec 06 '12 at 18:00

jul · Accepted Answer · 2012-12-06T18:41:46.267

0

The attribute can be accessed using self._Person__original_name.

edited Dec 06 '12 at 18:41

answered Dec 06 '12 at 18:27

jul

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Attribute error with custom model attribute

1 Answers1