Question

I added a counter cache called comments_count:

class AddCommentsCountToMicroposts < ActiveRecord::Migration
  def change
    add_column :microposts, :comments_count, :integer, :default => 0, :null => false
  end
end

to basically counts the number of comments for each micropost (Micropost model).
Now, this is how I order microposts by number of comments:

controllers/microposts_controller.rb:

  def index
    @microposts = Micropost.paginate(:page => params[:page],
                                     :per_page => 5).order('comments_count DESC')
  end

(I’m using the will_paginate gem)

Everything works as I want except that it is ordered created_at ASC. When there are two microposts with the same number of comments, the one created earlier is positioned first. I want the opposite, in other words, I want to order by comments_count DESC and created_at DESC at the same time.

Any suggestions to accomplish this?

Answer 1

.order('comments_count DESC, created_at DESC')