Betternestedset talk - Mar 2008 - Replicating a nested set structure to another model

Hi - first off BNS is awesome.  We are using it extensively in our project
and are very happy.

What I am trying to accomplish is replicating a nested set structure from
one model to another.  Currently, to do this, I am rebuilding the tree
structure entirely, as I am not able to simply copy nodes and their identity
(parent_id, rgt, lft) based off the "template" nested set in the
original
model.   This is very expensive code-wise, and the alternative (simply
copying the lft/rgt/parent_id structure) would allow for what I need.

BetterNestedSet enforces "move_to_child_of" and that seems to be the
prohibiting factor from simply creating the new structure with
parent_id/lft/rgt easily replicated through replicating or populating those
fields to a similar structure as the original.

Does anyone have a more graceful solution for this?  While functional,
rebuilding this structure with node-by-node traversal is not ideal.

Thanks,
Tory
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