ithank iam very rech no help by
On Sun, Dec 13, 2009 at 2:10 AM, Ryan Waldron <r...@erebor.com> wrote:
> If I have these classes:
>
> class Customer < ActiveRecord::Base
> has_many :jobs
> ...
> end
>
> class Job < ActiveRecord::Base
> belongs_to :customer
> ...
> end
>
> can I construct a named scope that returns the equivalent collection (but
> hopefully more efficient) to this:
>
> customers_with_jobs = Customer.all.reject{|t| t.jobs.empty?}
>
> I don't care about the number of jobs a customer has, or the state any of
> those jobs are in; I just want a named scope that will give me the ones who
> have jobs associated with them, hopefully without the massive N+1 query
> problem that the reject{...} gets me.
>
> It seems like this should be a relatively simple thing, but it has eluded
> me so far.
>
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