None field : Admin save setting it to empty value instead of NULL during save

[rahul jain]

Hi there !

One of my model fields attribute is set to null="true" to allow None
values. But if I use admin to save those model objects and leave it
blank, it saves blank value instead of None.
How to fix this ?

And Blank value is not None. Blank is "" (empty) but None is NULL in databases.

-RJ

[euan.g...@gmail.com]

Django admin can't differentiate between empty string and None and
picks empty string which makes sense in most cases.

If you don't like the idea of empty string override the save method
and coerce empty string to None before calling the super classes save,
e.g.

class YourModel(models.Model):
...

def save(self, *args, **kwargs):
if self.naughty_field == '':
self.naughty_field = None
super(YourModel, self).save(*args, **kwargs)

Euan

[rahul jain]

Could it be generic ?. I mean i don't want to specify self.naughty_field.

How to do it for self.any_field ?

RJ

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[rahul jain]

anyone on this ?

[Derek]

Have a look at:
http://www.mail-archive.com/django...@googlegroups.com/msg16095.html
some useful pointers on what fields are and how to access them.
Also:
http://stackoverflow.com/questions/3159614/iterating-through-model-fields-django