CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-3ruby-on-rails-4
Boris Kuzevanov
Boris Kuzevanov

Reputation: 1302

Rails undefined method `id'

I have two models:

Phonecall and Result:

class Phonecall < ActiveRecord::Base
  has_many :results
end

class Result < ActiveRecord::Base
  belongs_to :phonecall
end

All easy, if I do this code:

class CallsController < ApplicationController
  def index
    @phonecalls = Phonecall.order('datetime DESC').all

  end

end

and in view:

<% @phonecalls.each do |ph| %>
  <%= ph.results.id %>
<% end %>

I have an error: 

undefined method `id' for #<ActiveRecord::Associations::CollectionProxy []>

What am I doing wrong? I try to get property of Result object that in relation with my Phonecall object.

Upvotes: 2

Views: 6060

Answers (1)

Mandeep
Mandeep

Reputation: 9173

When you are doing ph.results it returns a ActiveRecord Relation and not a single record so you can't call method id on it. You need to use some logic to select a single result record from this relation.

If you want to display all the ids of results then you'll have to loop through all the results and then display them individually like this:

- @phonecalls.each do |ph|
  - ph.results.each do |r|
    = r.id

Upvotes: 6

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