CODEWITHSUNDEEP
ruby-on-rails-3
Sig
Sig

Reputation: 5948

Navigate nested has_many

I have nested has_many associations

Project has many Parts Part has many Tasks Task has many jobs

Is there a better way to get all the jobs associated to a project than

project.parts.each do |p|
  p.tasks.each do |t|
    t.jobs.each do |j|
      ...
    end
  end
end

Thanks

Upvotes: 3

Views: 85

Answers (1)

Raf
Raf

Reputation: 1083

You might add an has_many association with the through option, while you define a #jobs method in your Project model.

For instance :

class Project < ActiveRecord::Base
  has_many :parts
  has_many :tasks, through: :parts

  def jobs
    jobs = []
    tasks.each {|t| jobs << t.jobs }
    jobs.flatten
  end
end

Upvotes: 1

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