included module validations not seeing delegated instance methods

rubyonrails-talk
1

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

2

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?