Yup! Makes sense now. I hope it saves someone some trouble someday. :-) Thanks a lot, Tim!
Best, Ankush On Thursday, April 28, 2016 at 12:21:35 AM UTC+5:30, Tim Graham wrote: > > Please give this a try: https://github.com/django/django/pull/6524 > > On Wednesday, April 27, 2016 at 10:45:03 AM UTC-4, Ankush Thakur wrote: >> >> I'm not sure how Book.objects.first().chapters is different >> from Book.objects.first().chapters.count(), but the point is that >> "chapters" is not defined in the models at the top of that page! The >> snippet makes sense if I treat Book.chapters as another ManyToManyField >> (like authors), but it's really weird to see that error in the docs. So, >> does that mean I can report it? If yes, to who? >> >> On Wednesday, April 27, 2016 at 4:36:40 AM UTC+5:30, Tim Graham wrote: >>> >>> Looks like a typo. Does the rest of the example make sense and work if >>> that line is changed to "Book.objects.first().chapters"? >>> >>> On Tuesday, April 26, 2016 at 12:50:31 PM UTC-4, Ankush Thakur wrote: >>>> >>>> Folks, I'm having exceptional trouble understanding annotate(), >>>> aggregate(), and their various combinations. I'm currently stuck here: >>>> https://docs.djangoproject.com/en/1.9/topics/db/aggregation/#combining-multiple-aggregations >>>> >>>> The example here uses Book.objects.first().chapters.count(), but >>>> there's no chapters model or field at the start of the tutorial. It's >>>> frustrating, to say the least. Even if I set up a separate application to >>>> test this myself, what do I make of "chapters"? Is it another model with >>>> many-to-many relation with Book? When I ran an example with the following >>>> models: >>>> >>>> class Author(models.Model): >>>> name = models.CharField(max_length=100) >>>> age = models.IntegerField() >>>> >>>> class Book(models.Model): >>>> name = models.CharField(max_length=300) >>>> chapters = models.IntegerField() >>>> authors = models.ManyToManyField(Author) >>>> >>>> I got: >>>> >>>> >>> Book.objects.first().chapters.count() >>>> Traceback (most recent call last): >>>> File "<console>", line 1, in <module> >>>> AttributeError: 'int' object has no attribute 'count' >>>> >>> >>>> >>>> So basically, I feel like I'm screwed. Please help. >>>> >>> -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/20a60d70-ef3b-4036-9e5d-dbe228a250ef%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
