I have a bunch of records in a DB that look like
id | parent_id
--------------
1 | 4
2 | 4
3 | 2
4 | 0
5 | 2
6 | 1
7 | 3
8 | 7
9 | 7
I want to build a big has that looks like:
4 -> 1 -> 6
-> 2 -> 3 -> 7 -> 9
-> 5 -> 8
I'm like 90% of the way there, but I can't get my recursive assignment
to work. Has anyone done this before that could offer some pointers?
Here is my sample code thus far:
http://www.perturb.org/tmp/tree.txt
I can get one level of depth, but nothing more than that :(
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