On Dec 8, 9:28 pm, Andrew Godwin <and...@aeracode.org> wrote: > On 07/12/10 23:26, schinckel wrote: > > > > > > > I haven't been able to find any documentation about this, but would be > > happy to be pointed in the right direction. > > > When you use null=True in a field, and then use that model in the > > admin, it will not save NULL to the database, but will instead save an > > empty string (or attempt to). > > > I think this is broken behaviour: NULL values are semantically > > different to empty strings, and in certain cases (I think it was > > IPAddressField, but I will have another look later), it would fail to > > write to the database. > > > Is there a reason that the admin interface saves what should be a NULL > > value as an empty string? Do I report this as a bug? > > > Matt. > > Further to the other two replies, this is a known issue, and affects > things like unique constraints too. The relevant bug > -http://code.djangoproject.com/ticket/9590- was closed as WONTFIX a > while ago.
Yes, but don't we have new world order now? (GRIN). > General opinion last time I asked about this (it bites me occasionally) > is that there's a divide between people who use NULL, and between people > who think there should be one empty value, but even if fixed it'd > probably break backwards compatibility in so many subtle ways, it's > unlikely to occur. > My suggested workaround is to add a pre_save hook that manually fixes > the fields up. Someone I know has one that runs against all saves on all > models, and auto-corrects any "" values in nullable fields to None > before saving them. This looks like a good solution. I was just cleaning up the data in the clean() method on a form, but this is nicer. And global. -- You received this message because you are subscribed to the Google Groups "Django developers" group. To post to this group, send email to django-develop...@googlegroups.com. To unsubscribe from this group, send email to django-developers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-developers?hl=en.
