From: Gennady Bystritksy <gfb@...>
Date: 2005-08-09T01:54:16+09:00
Subject: Re: help me override ActiveRecord find?

Gennady Bystritksy wrote:
> Kelly Felkins wrote:
> 
>> I would like to add some things to the find method of activerecord, 
>> but I can't figure out how to do this.
>>
>> I've tried various things. Here is one example:
>>
>> class Thing < ActiveRecord::Base
>> alias_method "kellys_find", "find"
> 
> 
> Here you try to create an alias "kellys_find" for instance method "find" 
> (no "find" method for instances, hence the error).
> 
> Try something like this:
> 
> class Thing < ActiveRecord::Base
>   class << self
>     alias "kellys_find", "find"

Oops, "alias_method" here, of course.

>     def find(*arg)
>       puts "doing find"
>       # ^^ puts is is better here instead of print
>       kellys_find(*args)
>       #           ^ use asterisk here
>     end
>   end
> end
> 
> 
> 
>> def self.find(*args)
>> print "doing find\n";
>> kellys_find(args)
>> end
>> end
>>  
>> and I get this:
>>
>> kellyf@sb61g2:/var/www/rl-dev$ script/console
>> Loading development environment.
>> irb(main):001:0> t1 = Thing.find(2)
>> NameError: undefined method `find' for class `Thing'
>> from ./script/../config/..//app/models/thing.rb:12:in `alias_method'
>> from ./script/../config/..//app/models/thing.rb:12
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:189:in 
>>
>> `load'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:189:in 
>>
>> `load'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:38:in 
>>
>> `require_or_load'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:21:in 
>>
>> `depend_on'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:167:in 
>>
>> `require_dependency'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:167:in 
>>
>> `require_dependency'
>> from 
>> /usr/lib/ruby/gems/1.8/gems/activesupport-1.0.4/lib/active_support/dependencies.rb:180:in 
>>
>> `const_missing'
>> from (irb):1
>> irb(main):002:0>  
>> Any suggestions?
>>
> 
>