gistfile1.txt

class Parent < ActiveRecord::Base
  has_many :children
  has_many :skills, through: :children
  def self.with_skill(skill_type)
    eager_load(:skills, :children).map do |p|
      p.children = [] unless p.skills.any? { |s| s.skill_type =  skill_type }
      p
    end
  end
end