Question

Is there a rails helper for this case?

You have a Survey, which has_many Questions, which has_many Answers.

s = Survey.first
s.answers # => Returns the answers of all the survey questions

I didn’t want to recreate the wheel here.

Answer 1

It’s built in:

class Survey < ActiveRecord::Base
  has_many :questions
  has_many :answers, :through => :questions

  # ...
end

That’s it. Now you can call survey.answers and it’ll get all the answers.

Read up on the :through option (and its limitations) here