Cliff Moon on 30 May 2007 02:46:47 -0000

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[PhillyOnRails] AR accessor problem

I'm trying to track down whether or not a problem I'm having is specific to the JRuby platform, or it's an inherent limitation of AR. What I'm trying to do is something like:

cash += tx.gain

where tx is another AR object and gain is a calculated field which isn't persistent. My unit tests keep telling me that I'm trying to call nil.+ at this line, despite cash having been explicitly set. Curiously, the problem occurs exactly the same when the code is:

cash = cash + tx.gain

The following work:

blah = cash + tx.gain
cash = blah


self[:cash] = cash + tx.gain

So anyone have a clue what's going on here? Is this just a quirk of AR that I've been lucky enough not to have run into until now, or mightn't this be something JRuby related?
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