Rails - May 2011 - included module validations not seeing delegated instance methods

Hi,

Maybe the form of my validations module is deficient...

module MyValidationsModule
  extend ActiveSupport::Concern

  included do
    validate :some_custom_validation
  end

  def some_custom_validation
    <references to various instance methods of parent, e.g., ref_1 &
ref_2, here>
  end
end

...because when I include this module in a parent class and then in
that parent delegate to the methods of an associated AR class...

delegate :ref_1, :ref_2, :prefix=>false, :to=>:associated_ar

...when the validations execute in the parent, they do not find the
delegated instance methods.

Any thoughts?

Thanks,

Lille

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On Friday, May 13, 2011 6:10:19 AM UTC-6, Lille wrote:
>
> Hi, 
>
> Maybe the form of my validations module is deficient... 
>
> module MyValidationsModule 
>   extend ActiveSupport::Concern 
>
>   included do 
>     validate :some_custom_validation 
>   end 
>
>   def some_custom_validation 
>     <references to various instance methods of parent, e.g., ref_1 &
> ref_2, here> 
>   end 
> end
>
Wow, getting fancy there. Just a little off topic question, any reason why 
you don''t want to use the ActiveModel::Validator module and the 
#validates_with helper to break-out/organize your custom validations?

http://guides.rubyonrails.org/active_record_validations_callbacks.html#validates_with
 
>
> ...because when I include this module in a parent class and then in 
> that parent delegate to the methods of an associated AR class... 
>
> delegate :ref_1, :ref_2, :prefix=>false, :to=>:associated_ar 
>
> ...when the validations execute in the parent, they do not find the 
> delegated instance methods. 
>
> Any thoughts? 
>
>
Sure, just a few questions. If you manually define your methods #ref_1 and 
#ref_2 (and just put logging code in their implementations) as opposed to 
using delegation methods, do they get called? Also, what is the exact error 
message or indication of failure? Can you provide any more code? Are the 
delegations to a class where the parent (that includes your validation 
module) has_many, has_one, or belongs_to the associated model?

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