# comment's left/right
Comment.query.filter(Comment.discussion == self.discussion) \
.filter(Comment.left >= parent_right) \
- .update({ Comment.left: Comment.left + 2 })
+ .update({ 'left': Comment.left + 2 })
Comment.query.filter(Comment.discussion == self.discussion) \
.filter(Comment.right >= parent_right) \
- .update({ Comment.right: Comment.right + 2 })
+ .update({ 'right': Comment.right + 2 })
# Then stick the new comment in the right place
self.left = parent_right