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#3590 ✓resolved
pedm

Problem using merge conditions with orderedhashes

Reported by pedm | December 17th, 2009 @ 04:43 AM

Hi there - when I merge two ordered hashes, the merge works but does not respond to its more advanced settings. In particular, when I run the following code:

pos = Trade.sum("quantity", :conditions => {:buyer_id=>34}, :group => "traded_item_id")
neg = Trade.sum("quantity", :conditions => {:seller_id=>34}, :group => "traded_item_id")
pos.merge(neg){ |key, oldval, newval| oldval-newval }

The value that comes out is not the custom merge, but plain old:
pos.merge(neg)

To put this in a bit more context,
pos = #2}>
neg = #4}>

and the result is:

4}>

when it should be:

-2}>

So yeah, I've been using ruby on rails for about a year, and would love to help. So if someone could tell me where to start on this, I'd love to solve this for you guys. Thanks!
Pat

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