matrixgorup.rb

require 'rubygems'
require 'active_record'
require 'yaml'

dbconfig = YAML::load(File.open('config/database.yml'))
ActiveRecord::Base.establish_connection(dbconfig)

class Matrixgroup < ActiveRecord::Base

  def self.images
    brands.each do |brand|
      where(brand: brand).pluck(:imageRef4)
    end
  end

  private

  def brands
    pluck(:brand).uniq
  end

end