On Jul 12, 7:15 pm, Eric <[email protected]> wrote:
> On Jul 12, 10:19 am, "Älphä Blüë" <[email protected]>
> wrote:
>
> > > But the variable is unnecessary, and in fact, a more concise way of
> > > saying the same thing would be
>
> > > if Model.find(:all).empty?
>
> > Agreed. I was just showing that there are more ways of doing things. I
> > use your approach...
>
> > .empty?
> > .nil?
>
> > .. two things I use heavily in my projects...
>
> Typically I use something like 'unless Model.first', but are any of
> these techniques particularly lighter/faster on the db than others?
>
It won't make much difference if you expect your table to genuinely
only contain either 0 rows or a very small number of rows. If it might
contain 10s or hundreds or rows it will be way faster to check
Model.first than it would be to check Model.all.empty? (since you'd be
loading instantiating all hundred objects rather than just 1)
Fred
> -eric
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