The reason to use the 2) is to be able access the full info of the user author model. If you are interested in showing more than just the author_id then you should use the article.author (the .id is comes attached :P )
N. On Tue, Mar 1, 2011 at 6:41 PM, ydjango <traderash...@gmail.com> wrote: > In second one- article.author.id, django does a DB lookup to get > author object and then id is attribute of author. > In first article.author_id : author_id is direct attribute of article > (actually a foreign key field which django generates). Requires one > less DB lookup > > values both way are same. Performance is not. > > > On Mar 1, 3:11 am, Ankit Rai <i.ankit....@gmail.com> wrote: > > I am not getting what is difference between the 1 & 2?Can anyone tell me > the > > difference > > > > > > > > On Tue, Mar 1, 2011 at 9:16 AM, ydjango <traderash...@gmail.com> wrote: > > > class Article(models.Model): > > > author = models.ForeignKey(Author) > > > title = models.CharField(max_length = 100) > > > > > (assume an article can have only one author) > > > > > article = Article.objects.get(title="Django is awesome) > > > > > if I need only author id, I can access author id as 1) > > > article.author_id or 2) article.author.id > > > > > I prefer first article.author_id as it requires less db lookup and > > > hence better performance. > > > > > Any reason to use 2nd way over 1st. > > > > > ( I understand this approach only works for id and not for say author > > > name) > > > > > -- > > > 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 > > > django-users+unsubscr...@googlegroups.com. > > > For more options, visit this group at > > >http://groups.google.com/group/django-users?hl=en. > > > > -- > > > > *Ankit Rai* > > > > * > > * > > -- > 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 > django-users+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/django-users?hl=en. > > -- Norberto Leite -- 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 django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
