I screwed up my example if it matters... should have gone more like:
Class Area < ActiveRecord::Base
def taxes
return .1
end
def calc_price(amount)
amount + (amount * determine_taxes)
end
end
class InnerCity < Area
def self.find(*args)
super(args.first,
args.extract_options!.merge(:conditions=>{:postcode=>[2001, 2002]})
end
def taxes
return .5 + new_bridge_tax
end
end
Area.new.calc_price(3)
InnerCity.new.calc_price(3)
etc.
On Thu, Aug 13, 2009 at 8:28 PM, Sonia Hamilton <[email protected]> wrote:
> Thanks everyone for all your suggestions. I'm using Ben's method as it works
> best for my scenario, but I'll file away the techniques for future use.
>
> My old rails doesn't have extract_options, so I broke this up into a few
> lines:
>
> options = args.last.is_a?(Hash) ? args.last : {}
> options = options.merge(:conditions=> ...
> super(args.first, options)
>
> --
> Sonia Hamilton.
>
>
>
> ben wiseley wrote:
>
> I think it really depends on what's needed. If you simply need to filter
> rows then, yes, the solution below is good. But, if you need custom logic
> for InnerCity vs Rural then I'd sub class the models like you originally
> suggested.
>
> Class Area < ActiveRecord::Base
> def taxes
> return .1
> end
>
> def calc_price(amount)
> amount + (amount * determine_taxes)
> end
> end
>
> class InnerCity < ActiveRecord:Base
> def self.find(*args)
> super(args.first,
> args.extract_options!.merge(:conditions=>{:postcode=>[2001, 2002]})
> end
>
> def taxes
> return .5 + new_bridge_tax
> end
>
> def calc_price(amount)
> amount + (amount * determine_taxes)
> end
> end
>
> etc.
>
>
> On Thu, Aug 13, 2009 at 6:27 PM, Dylan Egan <[email protected]> wrote:
>
>>
>> It would go in the model.
>>
>> class Location < ActiveRecord::Base
>> def self.all_from_inner_city
>> find(:all, :conditions=>{:postcode=>[2001, 2002]})
>> end
>> end
>>
>> Location.all_from_inner_city
>>
>> or
>>
>> class Location < ActiveRecord::Base
>> def self.from_inner_city(*args)
>> find(args.first,
>> (args.extract_options!.merge(:conditions=>{:postcode=>[2001, 2002]}))
>> end
>> end
>>
>> Location.from_inner_city(:all, :order => 'id DESC')
>> Location.from_inner_city(:first)
>>
>> Cheers,
>>
>> Dylan.
>>
>>
>>
>
>
>
> >
>
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