Validate uniqueness of in association

Question

Given the following classes:

class Candidate
  has_many :applications
  has_many :companies, :through => :job_offers
end

class JobOffer
  belongs_to :company         


        

Answer 1

this is how I will structure the models:

class Candidate
  has_many :applicatons
  has_many :job_offers
  has_many :offering_companies, :through => :job_offers
end

class Application
  belongs_to :candidate
end

class JobOffer
  belongs_to :candidate
  belongs_to :company

  validates_uniqueness_of :candidate_id, :scope => :company_id
end

class Company
end

This should work! Btw. I will call the application something else to avoid the naming confusion( rails already has application.rb