Extend ActiveRecord::Base

Rails
1

Hi,

I want to exten ActiveRecord::Base with own methods:

class Stock < ActiveRecord::Base
def compare_own
…
end
end

But call Stock.compare_own fails:
NoMethodError: undefined method compare_own' for Calendar:Class /var/lib/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1129:inmethod_missing’

But why?

I want to use only ActiveRecord from RoR, I hope this isn’t a problem.

Best regards,
Tomas

2

Tomas F. wrote:

class Stock < ActiveRecord::Base
def compare_own
…
end
end

But call Stock.compare_own fails:
NoMethodError: undefined method compare_own' for Calendar:Class /var/lib/gems/1.8/gems/activerecord-1.14.4/lib/active_record/base.rb:1129:in method_missing’

You’ve defined an instance method but you’re trying to call it as a
class method.

Given your current code, you have to have an instance of Stock before
you can call your method:

s = Stock.new # or s = Stock.find(:first), etc.
s.compare_own

If you really mean it to be a class method, then you can define it like
this:

def self.compare_own
…
end

Does this help?

Jeff

3

On Aug 11, 2006, at 7:09 PM, Tomas F. wrote:

base.rb:1129:in
`method_missing’

You defined an instance method, but called a class method.

Dave