Thank you, that's very clear now. I completely forgot those were querysets. Thank you for your time.
WB On Feb 10, 2008 10:48 AM, Malcolm Tredinnick <[EMAIL PROTECTED]> wrote: > > > On Sun, 2008-02-10 at 10:33 -0500, Prof. William Battersea wrote: > [...] > > > > 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 == "") > > There are multiple problems here. Firstly, you want to be iterating over > self.location.all(), not self.location. The self.location attribute is a > ManyRelatedManager instance (which you really don't care about at all, > trust me -- the point is, it's not something iterable). You use > self.location as a queryset, essentially, so you can filter it, etc. > > Secondly, 'v' will then be a Location instance. So comparing it to "" is > not going to do anything sensible. Possibly you want to be testing if > str(v) != "" instead (comparing apples to apples, rather than elephants > to apples). > > I'm still not entirely sure why this problem led to the error you > reported, but it's not impossible to imagine. I would have expected you > to get some kind of error like "ManyRelatedManager is not iterable", > though. *shrug* > > Regards, > Malcolm > > -- > No one is listening until you make a mistake. > > http://www.pointy-stick.com/blog/ > > > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
