ruby on rails - Validation methods in plugins -

i using ruby on rails 3.0.7 , trying implement act_as_article plugin application. run validation methods "acting article class" inside plugin (note: plugin requires create database table columns in order work - 1 of these represented title attribute).

in ror application have code:

# vendor/plugins/article/lib/acts_as_article.rb module article   extend activesupport::concern    included     validates :title,  # validation method       :presence => true   end    module classmethods     def acts_as_article       send :include, instancemethods     end   end    module instancemethods     ...   end end  activerecord::base.send :include, article   # app/models/review.rb class review   acts_as_article    ... end 

using above code plugin works. if add record association in review class this:

class review   acts_as_article    has_many :comments # adding association    ... end 

and in reviewscontroller add following, well:

def create   ...    @article.comments.build(   # code line 89     :user_id => @user.id   )    if @article.save     ...   end end 

i error

nomethoderror (undefined method `title' #<comments:0x00000103abfb90>):   app/controllers/articles_controller.rb:89:in `create' 

probably happens because validation run review "associated" classes\models , comment class doesn't have title attribute. think because if inside plugin code comment out validation method this

module article   ...    included     # validates :title,  # validation     #   :presence => true   end    ... end 

i don't errors anymore.

so, how can solve issue?

note: not expert on creating plugin (this first time), ask implicitly if i'm doing job plugin implementation...

you including validates_presence_of :title in activerecord::base, , every active record model picking up. instead, should do:

# vendor/plugins/article/lib/acts_as_article.rb module article   extend activesupport::concern     module classmethods     def acts_as_article       validates :title,  # add validation method here         :presence => true       send :include, instancemethods     end   end    module instancemethods     ...   end end 

so include validation on activerecord models expect validation go through. let me know if solves issue.