CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-4
Boris Kuzevanov
Boris Kuzevanov

Reputation: 1302

Rails 4: How i can get record of has_many through relationship?

I have 3 tables: Phonecalls, Results, Questions.I have 3 models also : Phonecall, Result, Question

Schema of Phonecalls is: id, date,user_id

Schema of Questions is: id, text,error

Schema of Results is: id, phonecall_id, question_id, result

My Phonecall.rb is:

class Phonecall < ActiveRecord::Base
  has_many :results
  has_many :questions, :through => :results
end

My Result.rb is:

class Result < ActiveRecord::Base
  has_one :question
  belongs_to :phonecall
end

And my Question.rb:

class Question < ActiveRecord::Base
  belongs_to :result
  has_many :phonecalls, :through => :result
end

So how i can get Question properties in this loop:

<%
@phonecalls.each do |ph|
  ph.results.each do |r|

%>
    <%= ph.id %>
    <%= r.id %>       
<%
  end
end
%>

If i try to get r.question.id - i have error. If i try to do some loop with ph.questions - i have error.

How i can do it?

Upvotes: 0

Views: 615

Answers (2)

Boris Kuzevanov
Boris Kuzevanov

Reputation: 1302

Yes, my problem was in my relationships.

in Result.rb i told that result belogs to question but it's false. Now i have this relatioships: Result.rb:

class Result < ActiveRecord::Base
  belongs_to :question
  belongs_to :phonecall
end

Questio.rb

class Question < ActiveRecord::Base
  has_many :result
  has_many :phonecalls, :through => :result
end

It's work for me.

Upvotes: 0

Anthony
Anthony

Reputation: 15987

has_many :phonecalls, through: :result allows you to do:

question.phonecalls that will give you back an array of phonecalls associated with your one question instance.

Inversely and to answer your question it would be:

@phonecalls.each do |ph|
  ph.questions.each do |question|
   puts ph.id
   puts question.id
  end
end

Upvotes: 1

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