On Sunday 13 February 2011 18:18:39 BW wrote:
> I know you can override the save() method in a model, but is it
> possible to do it when you try to get a row or rows from a db? I have
> data like this '\xFF\x00\x00\x00\xFE'... that I need to store in a
> MySQL db.
>
> When I was trying to save it I was getting an error. Now I override
> the __save__ method and encode the data right before it's saved. This
> works out fine, it's just that now I need to always code in the
> decode('string-escape') every time I need to access the data. Is it
> possible to override a method so when I use the A.objects.get /
> filter / all methods it will automatically decode for me. Can I just
> override a method like __get__ / __filter__ and just call the
> superclass? I don't want to go down this road only to discover in a
> couple of months that it's breaking something on the back end.
>
> (How I'm doing it now )
> class A(model):
> encoded_data = models.TextField(max_length=4000)
>
> def __save__(self):
> encoded_data = self.encoded_data.encode('string-escape')
> super(A, self).save(*args, **kwargs)
>
> data = '\xFF\x00\x00\x00\xFE' #-- similar to this
> aObject = A()
> aObject.encoded_data = data
> aObject.save()
>
>
> anotherObject = A.objects.get(id=1)
> decoded_data = anotherObject.encoded_data
> decoded_data = decoded.data.decode('string-escape')
Why not make your own custom model field that does decoding/encoding as needed.
No more hacking into save/get procedures.
See <http://docs.djangoproject.com/en/1.2/howto/custom-model-fields/> for more
information.
--
Jani Tiainen
--
You received this message because you are subscribed to the Google Groups
"Django users" group.
To post to this group, send email to django-users@googlegroups.com.
To unsubscribe from this group, send email to
django-users+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en.
