From: "ara.t.howard" <ara.t.howard@...>
Date: 2008-06-19T06:10:00+09:00
Subject: Re: Rather validate values or use exceptions?


On Jun 18, 2008, at 1:26 PM, Joshua Muheim wrote:

realized i should have been a bit more clear, you have at least two  
race conditions here


1)

> if music_artist_id and MusicArtist.exists?(music_artist_id)

record found, but deleted by another process

>
>  @music_artist = MusicArtist.find(music_artist_id)

raises RecordNotFound


2)

> if music_artist_id and MusicArtist.exists?(music_artist_id)

record claims no to exist

another process creates it right here

>
>  @music_artist = MusicArtist.find(music_artist_id)

so we never execute this



a @ http://codeforpeople.com/
--
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h.h. the 14th dalai lama