ruby on rails - How to build associations/records in models using after_create -

i have user model

has_many :trial_subscriptions accepts_nested_attributes_for :trial_subscriptions, :allow_destroy => true  attr_accessible :trial_subscriptions_attributes 

the trial_subscription inherits subscription model , model belongs_to :user subscription model belongs_to :question_bank , question bank model has_many :subscriptions, dependent: :destroy

i have form creating user , posting correctly.

i want add after_create callback

with method starts trial subscription user , question bank subscription after user creation has been detected.

1) doing call in user model or trialsubscription model? doing in trialsubscription model

here method far

class trialsubscription < manualsubscription    after_create :create_trial_subscription_for_all_qbanks    def create_trial_subscription_for_all_qbanks     if !trial_account_made_by.nil? #in user        questionbank.all each |q|          trialsubscription.create!(question_bank_id: q.id, user_id: self.id, manual_expiry_date: time.now + (2*7*24*60*60) )       end      end    end  end  

in rails c after submit new user in form, keep on doing

a = user.last a.trial_subscriptions #returns array  

i think create! should trick

put callback user model:

#app/models/user.rb class user < activerecord::base     has_many :trial_subscriptions      after_create :create_trial     def create_trial        questionbank.all each |q|             self.trial_subscriptions.build({question_bank_id: q.id, manual_expiry_date: time.now + (2*7*24*60*60)})        end        self.trial_subscriptions.save     end end