On Feb 10, 2008 9:50 AM, Malcolm Tredinnick <[EMAIL PROTECTED]> wrote: > > > On Sun, 2008-02-10 at 09:27 -0500, Prof. William Battersea wrote: > > Hello, > > > > I created a Django application, validated it for errors and ran syncdb > > without any problems. I can click into the admin section but as soon > > as I click "Add" for one of my models I get the error > > AttributeError at /admin/gallery/gallery/add/ > > 'str' object has no attribute 'creation_counter' > > Request Method: GET > > Request URL: http://localhost/admin/gallery/gallery/add/ > > Exception Type: AttributeError > > Exception Value: 'str' object has no attribute 'creation_counter' > > Exception Location: > > C:\Python25\lib\site-packages\django\db\models\fields\__init__.py in > > __cmp__, line 100 > > > > This line is: > > def __cmp__(self, other): > > # This is needed because bisect does not take a comparison function. > > return cmp(self.creation_counter, other.creation_counter) > > > > I'm having a hard time troubleshooting this. My models look fine to me. > > So you're quite familiar with your models and cannot see the problem. We > are not familiar with them, but only get shown the last line of the > traceback. It seems like one party has a lot more information than the > other here. :-) > > If your model is short (and preferably, try to reduce your example to a > very short case that still fails), post the model. > > Also, look at the full traceback in the debug screen, go to the last > line and click on the local variables button. You'll be able to see what > "self" and "other" are. One of them *won't* be a Field class, although > it should be (since creation_counter is an attribute on the Field > class). That might give you some clues as to what is going wrong. > Somehow you are managing to get a string into somewhere that a Field > class (or subclass) is expected. > > Do you have a custom save() method involved here at all? It's going to > be something like that, since it's not the field definitions themselves > (the model validated). > > Sorry I can't offer an immediate solution, but the lack of information > is hurting us a bit here. > > Regards, > Malcolm > > -- > Save the whales. Collect the whole set. > http://www.pointy-stick.com/blog/ > > > > >
Heh. Sorry I didn't want to just throw all my code at someone. I was hoping it was a common problem. While I was trying to put more information into this email, I think I solved the problem. I had a Model called Gallery, which had a ManyToManyField pointing to a Model called Location. In location, I had set my __str__ method to: return " / ".join(str(v) for v in self.location if not v == "") Thinking that it would be handy to have these display in a default format of Country / State / City. (location in the line above is a list containing Country,State and City variables, any of which can be blank) I noticed that although Locations were saving, I was getting the same error on the save page and a listing of (None) on the locations page. So I switched the __str__ method in Location to return self.country and everything seems to work. What did I mess up by overriding the __str__ method originally? I did have a custom save method in my Gallery model too. Thanks --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
