Ruby on Rails Active Record through

Question

I've been trying got data from another table and it doesn't work. I have three tables: vacancies , resumes , connections .

---

vacancy.rb

  has_many :connections
  has_many :resumes, through: :connections

resume.rb

  has_many :connections
  has_many :vacancies, through: :connections

connection.rb

  belongs_to :vacancy
  belongs_to :resume

Resumes and Vacancies tables has id, name columns

Connections table has id , resume_id , vacancy_id columns

My code - @candidates = Resume.joins(:connections).where(connections: { vacancy_id: current_user.vacancies })

It's showing data from Resume table, but I can't fetch it with Vacancies table. How can I output vacancy name for example? I tried resume.connections.vacancy.name in view but doesn't work -

undefined method `vacancy' for #<Connection::ActiveRecord_Associations_CollectionProxy:0xb43ac9d8>

Answer 1

Ah - yes, that's just not going to work... you are calling "vacancy" on a set of connections... (arrays don't have a method called "vacancy" but each member of that array will). So: do you want to call "vacancy" on each connection? or do you want to collect the name of each vacancy from the set of collections?

try something like this instead:

vacancy_names = resume.connections.map{|con| con.vacancy.name }

alternatively:

resume.connections.each do |con| 
   puts con.vacancy.name
end