Question

I used django-mptt version (0,5,’+dev’)

My model looks like:

class Comment(MPTTModel):
    content = models.CharField(max_length = 300)
    parent = TreeForeignKey('self', null=True, blank=True, related_name='child')

    class MPTTMeta:
        order_insertion_by = ['-creation_time']

Now, I change Meta in Comment model:

class MPTTMeta:
        order_insertion_by = ['creation_time']

then, I rebuild the tree under the django shell followed by THIS:

models.comment.tree.rebuild()

However, it throws:
AttributeError: type object 'Comment' has no attribute 'tree'

What’s wrong with that? How to rebuild the tree in django-mptt?

Thanks!

Answer 1

Have you tried:

Comment.objects.rebuild()

Because rebuild is a function defined on the TreeManager class

In the SO article you referenced, I assume he had set a custom manager to the tree attribute. But you haven’t and thus is on the objects attribute.

Are you acquainted with Model Managers?