On 10/30/07, Ben <[EMAIL PROTECTED]> wrote:
> I don't specifically need the before value, I need to know which of
> the fields have changed.
Okay, well, it still raises the same question, anyway.
But, regardless, you pretty much have two options:
- Store the values when the object is instantiated, and check those
when it's saved
- Perform a second query just before saving
It'd look something like this (untested code, beware):
class MyModel(models.Model):
spam = models.TextField(maxlength=255)
eggs = models.IntegerField()
def __init__(self, *args, **kwargs):
super(MyModel, self).__init__(*args, **kwargs)
self.__orig = {}
for field in MyModel._meta.fields:
self.__orig[field.name] = getattr(self, field.name)
def save(self):
_changed = []
for field in MyModel._meta.fields:
if self.__orig[field.name] != getattr(self, field.name):
_changed.append(field.name)
# Do something with _changed
# It's a list of field names whose values have changed
super(MyModel, self).save()
That's the basic idea, anyway. Hope this helps.
-Gul
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