Question

Everyday, I need to run the a script and send all of my users an ‘exam’ or set of questions. I have modelled as class ‘Exam’ which subclasses ActiveRecord::Base. Now, how do I send user’s instances of Exam?

What I was thinking was create a new class called ‘ExamInstance’ which would have a reference to ‘Exam’ and the user.

I am new to SQL and ActiveRecord so if someone can help me better model this so I can avoid problems later on or just give me some insight, that would be great.

Thanks

Answer 1

I’ll suggest just use has_many :through create a model UserExam for many to many relation between exam and user

class User < ActiveRecord::Base
  has_many :users_exams
  has_many :exams, :through => :users_exams
end
 
class UserExam < ActiveRecord::Base
  belongs_to :users
  belongs_to :exams
end
 
class Exam < ActiveRecord::Base
  has_many :users_exams
  has_many :users, :through => :users_exams
end

For more information on has_many :through