I'm not sure what your end goal is here, but since you seem to be
storing settings in a database, you might consider my dbsettings
app[1], designed for exactly that purpose. I can't guarantee it does
what you need, but it's probably worth looking into.
To answer your question specifically though, you would also need to
check to see whether the save() would produce an update or insert
statement, by looking at the id value. Try something like this:
def save(self):
"""There should not be more than one Blog object"""
if Blog.objects.count() and not self.id:
raise "Only one blog object allowed."
super(Blog, self).save() # Call the "real" save() method.
But if you really are storing settings, I think you'll find that
dbsettings can save you quite a bit of work.
-Gul
[1] http://code.google.com/p/django-values/
On Dec 20, 2007 9:32 AM, shabda <[EMAIL PROTECTED]> wrote:
>
> I have tabble where I am storing sitewide settings. So I want only
> one row to be created in this table. I am trying to enforce this by
> over riding the save method.
>
> If I do something like
> def save (self):
> """There should not be more than one Blog object"""
> if Blog.objects.count() > 1:
> raise "Only one blog object allowed."
> super(Blog, self).save() # Call the "real" save() method.
>
> I can get two rows, as when the second time save gets called, count is
> only one.
>
> If I do something like
> def save (self):
> """There should not be more than one Blog object"""
> if Blog.objects.count() >= 1:
> raise "Only one blog object allowed."
> super(Blog, self).save() # Call the "real" save() method.
> Only one object is allowed, but updates wil fail. How can I enforce
> single rows only?
> >
>
--~--~---------~--~----~------------~-------~--~----~
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 [EMAIL PROTECTED]
For more options, visit this group at
http://groups.google.com/group/django-users?hl=en
-~----------~----~----~----~------~----~------~--~---
