Rails - Oct 2005 - Attempting to override find

Can someone give me an example of how to override find? I want to setup
default order_by conditions and thought this would be a good way to do it. I
appear to be having trouble with ruby syntax, and don''t understand how
*args
stores key => value pairs.

Thanks,

Dave


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On Tuesday 11 October 2005 06:54, David Clements wrote:
> Can someone give me an example of how to override find? I want to
> setup default order_by conditions and thought this would be a good
> way to do it. I appear to be having trouble with ruby syntax, and
> don''t understand how *args stores key => value pairs.
Have a look at ActiveRecord::Base#constrain(t). I''m not sure whether 
it''s in 0.13.1, though.

Michael

-- 
Michael Schuerig                   The Fifth Rider of the Apocalypse
mailto:michael-q5aiKMLteq4b1SvskN2V4Q@public.gmane.org         is a programmer.
http://www.schuerig.de/michael/

On 11-okt-2005, at 12:41, Michael Schuerig wrote:
> On Tuesday 11 October 2005 06:54, David Clements wrote:
>
>> Can someone give me an example of how to override find? I want to
>> setup default order_by conditions and thought this would be a good
>> way to do it. I appear to be having trouble with ruby syntax, and
>> don''t understand how *args stores key => value pairs.
>>
>
> Have a look at ActiveRecord::Base#constrain(t). I''m not sure
whether
> it''s in 0.13.1, though.
That''s a nice method Michael, thanks for pointing out. Pity that you  
cannot use it as a default (i.e. configure it on class level).

As to overwriting find:

     def self.find(*args)
         unless args[1] && args[1].respond_to?(:[]) &&
args[1][:order]
              args[1] = {} unless args[1]
             args[1][:order] = ["#{self.table_name}.sortable ASC"]
         else
#            logger.warn "Special ordering provisions have been set,  
if you want to order Cards alphabetically do it yourself"
         end
         super(*args)
     end

This adds default ordering by the "sortable" column, but it probably  
can be overridden.

-- 
Julian "Julik" Tarkhanov

On 10/11/05, Julian ''Julik'' Tarkhanov
<listbox-RY+snkucC20@public.gmane.org> wrote:
>
> On 11-okt-2005, at 12:41, Michael Schuerig wrote:
>
> > On Tuesday 11 October 2005 06:54, David Clements wrote:
> >
> >> Can someone give me an example of how to override find? I want to
> >> setup default order_by conditions and thought this would be a good
> >> way to do it. I appear to be having trouble with ruby syntax, and
> >> don''t understand how *args stores key => value pairs.
> >>
> >
> > Have a look at ActiveRecord::Base#constrain(t). I''m not sure
whether
> > it''s in 0.13.1, though.

Yeah I didn''t find this in the docs,  maybe a different version.
> That''s a nice method Michael, thanks for pointing out. Pity that
you
> cannot use it as a default (i.e. configure it on class level).
>
> As to overwriting find:
>
>      def self.find(*args)
>          unless args[1] && args[1].respond_to?(:[]) &&
args[1][:order]
>               args[1] = {} unless args[1]
>              args[1][:order] = ["#{self.table_name}.sortable
ASC"]
>          else
> #            logger.warn "Special ordering provisions have been set,
> if you want to order Cards alphabetically do it yourself"
>          end
>          super(*args)
>      end
>
> This adds default ordering by the "sortable" column, but it
probably
> can be overridden.
>
> --
> Julian "Julik" Tarkhanov

Great thanks,  this is what I was looking for.  I didn''t realize that
*args was an array with the constraints as a Hash in the first
element.  By knowledge of Ruby has increased now as well.

Dave