refactor to be scalable (ruby iteration)

gistfile1.rb

  def my_deals
    #@orders = @current_user.orders.joins(:brand).where{|q| q.brand.slug == @current_brand.slug }.ordered.order('created_at DESC').paginate(:page => params[:page], :per_page => 10)
    #other_brands = @current_user.orders.ordered.joins(:brand).includes(:brand).where{|q| q.brand.slug != @current_brand.slug }.map{|o| o.brand}.uniq
    #@other_brands = BrandDecorator.decorate(other_brands)
    @brands = SimpleBrand.all + NormalBrand.all
    @orders = Array.new

    @brands.each do |b| 
      @orders << @current_user.orders.ordered.joins(:brand).where{|q| q.brand.slug == b.slug}.ordered.order('created_at DESC').paginate(:page => params[:page], :per_page => 3)
    end
    @brands = BrandDecorator.decorate(@brands)
    render 'users/orders/index'
  end