Sebastia
12/12/2006 12:49:00 AM
Wonderful! For some reason the 2-argument notation in your example
didn't work for me, but with a Proc as the method definition body all
is dandy. I had tried class_eval before but ignorantly used it on the
array instance instead, which of course doesnt work. So, thanks very
much for your help.
Here's the final code:
returning find(:all, :order => "#{sort_by_term} #{sort_order_term}") do
|results|
(class << results; self; end).class_eval do
define_method(:sorted_by?) { sort_by_term }
define_method(:sort_order?) { sort_order_term }
end
end
On 2006-12-11 18:02:34 -0600, dblack@wobblini.net said:
> Hi --
>
> On Tue, 12 Dec 2006, Sebastia wrote:
>
>> I have a sorted array (in this case, an ActiveRecord result set) that i
>> want to give awareness of its sorting state. I defined a singelton
>> method on the array but i can't figure out how to insert a value from
>> the surrounding scope. Below is the best i could come up with, but it
>> seems quite horrid (and using plain eval would be even worse i
>> suppose). I seem to remember that there was a better way... Anybody?
>>
>> Thanks,
>> Sebastian
>>
>> sort_term = "label"
>> results = User.find(:all, :order => sort_term)
>>
>> class << results
>> def sorted_by?
>> @sorted_by_term
>> end
>> end
>>
>> results.instance_variable_set("@sorted_by_term",sort_term)
>
> To get through the barrier of the class and def scopes, you can use
> class_eval and define_method:
>
> (class << results; self; end).class_eval do
> define_method(:sorted_by?, sort_term)
> end
>
> or something along those lines.
>
>
> David