On 16 Jan 2009, at 10:19, Herman wrote:
>
> Basically what I'm trying to do is get the sum of 2 columns and save
> those results in another. I guess I'm looking to do something like
> this:
> a = Product.find(:all)
> b = Product.sum("test + test2", :group => "id")
> a.test3 = b
> a.save
>
> Obviously that doesn't work, but I'm trying to achieve something like
> that. Any suggestions?
>
Product.update "test3 = test+test2" would probably do it.
Fred
> >
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