How to return model and models related to this model with many-to-many relationships

Question

I have two models. Comment and his "Subcomments":

class Comment(models.Model):

    ....
    author = models.CharField(max_length=80)
    published = models.DateTimeField(auto_now_add=True)
    email = models.EmailField(blank=True)
    url = models.URLField(blank=True)
    post = models.ForeignKey(Entry)
    subcomments = models.ManyToManyField('Subcomment', blank=True)
    ....


class Subcomment(models.Model):

    ....
    author = models.CharField(max_length=80)
    published = models.DateTimeField(auto_now_add=True)
    email = models.EmailField(blank=True)
    url = models.URLField(blank=True)
    mcomment = models.ForeignKey(Comment)
    ....

I trying to make RSS subscribtion to post comments. I use following code:

class EntryCommentsFeed(Feed):

    ....
    def items(self, obj):
        return Comment.not_spam.filter(post=obj).order_by('-published')[:15]
    ....

But It returns only Comments without subcomments, and i don't have any idea how to return comment itself with his 'subcomments' and order by date.

Answer 1

It's not possible. Model querysets are only ever composed of objects of that model type. You can loop through the returned Comments and get the Subcomments for each, though:

for comment in Comment.not_spam.filter(post=obj).order_by('-published')[:15]:
    subcomments = comment.subcomment_set.all()