I'll admit mine was a bad example. However, the most common (only?)
use case I could see for it is in fact with #send.
Your idea for filtering is great, by the way.
On Apr 9, 9:19 pm, Mislav Marohnić <mislav.maroh...@gmail.com> wrote:
> On Fri, Apr 9, 2010 at 13:26, Joao Carlos <m...@joao-carlos.com> wrote:
>
> > filter = %w(with_votes without_votes).include?(params[:filter]) ?
> > params[:filter].to_sym : :self
> > Idea.published.send(filter).all
>
> I wouldn't call this use case where it would be "extremely handy". Here is
> better code for it:
>
> filters = Idea.scopes.keys & Array.wrap(params[:filter]).map(&:to_sym)
>
> records = filters.inject(Idea.published) { |model, name|
> model.send(name) }.all
>
> First bonus feature is that it knows about all your named scopes, you don't
> have to specify them in the controller (business logic in your controller =
> wrong).
>
> Another bonus feature — multiple filters can be given:
>
> GET /resource?filter[]=foo&filter[]=bar
>
> Third bonus feature is that we didn't need to extend the language with a
> method that doesn't do absolutely anything.
> (Even `tap` does something and is incredibly useful.)
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