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Re: [PhillyOnRails] ActiveRecord: updating a single attribute
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- From: "Evan Weaver" <evan@cloudbur.st>
- To: talk@phillyonrails.org
- Subject: Re: [PhillyOnRails] ActiveRecord: updating a single attribute
- Date: Thu, 24 Jan 2008 14:54:18 -0500
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> Is likely to eat data during concurrent access if you don't go around adding locking support to
> everything.
That's kind of misinformed; you can use pessimistic locking in AR if
you want. You can pick two of concurrent updates, application-side
validations, and no race losses. AR normally picks the first two.
Evan
On Jan 24, 2008 2:49 PM, Justin Reagor <justinwr@gmail.com> wrote:
> I believe this also jives with Sequel...
>
>
> http://code.google.com/p/ruby-sequel/
>
>
> On Jan 24, 2008, at 2:43 PM, Eric Snyder wrote:
>
>
> "ActiveRecord updates every column in a row during a save whether that
>
> column changed or not. So it performs work it doesn't really need to.
>
> Which is much slower, and is likely to eat data during concurrent
>
> access if you don't go around adding locking support to everything."
>
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--
Evan Weaver
Cloudburst, LLC
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