On 6 sep, 01:54, Alex Chun <[EMAIL PROTECTED]> wrote:
> How can I subclass a model class,
http://www.djangoproject.com/documentation/model-api/#model-inheritance
> in order to add a temporary field?
"temporary" ?
> For example, say I have a class Car, and I want to subclass it to
> TempCar, and add a comment field.
>
> class TempCar(Car):
> comment = models.CharField(max_length = 200)
Inheritance may not be the only nor necessarily the best solution. To
be true, in the above example, it would even be a design mistake IMHO.
Have you considered a related "comment" model ?
> The trouble arises when I try to get a QuerySet by doing something
> like,
>
> redCars = TempCar.objects.filter(color='red')
>
> Django gives me a programming error 1146, table
> myproject.myapp.TempCar doesn't exist.
Did you run ./manage.py syncdb ?
HTH
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