On Jul 1, 9:50 am, Mathieu Leplatre <leplat...@gmail.com> wrote:
> On 1 juil, 14:44, coan <a.ne...@gmail.com> wrote:
>
>
>
>
>
> > I have a friendship model for users and want to retrieve all the posts
> > my friends made.
>
> > class Friendship(models.Model):
> > from_friend = models.ForeignKey( User, related_name='friend_set' )
> > to_friend = models.ForeignKey( User, related_name='to_friend_set' )
>
> > class Post(models.Model):
> > text = models.TextField()
> > user = models.ForeignKey(User)
>
> > I retrieve my friends posts with this:
>
> > my_friendships = Friendship.objects.filter(from_friend=request.user)
> > list_of_my_friends_ids = []
>
> > for friendship in my_friendships:
> > list_of_my_friends_ids.append(friendship.to_friend.id)
You can do the above with a one-liner:
list_of_my_friends_ids = Friendship.objects.filter
(from_friend=request.user).values_list('id', flat=True)
See:
http://docs.djangoproject.com/en/dev/ref/models/querysets/#values-list-fields
Hope that helps.
-RD
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