[wp-hackers] Category Operation (Adjacency vs. Modified Preorder)
agent_eight at hotmail.com
Sat Feb 11 18:15:33 GMT 2006
> I'm not sure that I see the sense in using modified preorder for WP
> It seems that the only thing we gain is the ability to count the number of
> children any given node has.
The real draw that I see is the ability to create easily readable subtrees.
You'ld have a dummy root node at the top of the tree and then a handful of
subtrees as children. One for youre main blog entries, one for an aside,
etc. You could include or exclude whole trees with single queries.
> However, it becomes significantly more
> difficult to loop through, say, the top level categories.
That's where the addition of a "level" field comes in. If your dummy root
node is at level 0, just query all the children of root with level = 1. I
think that's what you were looking for
I do admit this is a feature that does really need transactions to be safely
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