Rails has_many association count child rows

Question

What is the \"rails way\" to efficiently grab all rows of a parent table along with a count of the number of children each row has?

I don\'t want to use counte

Answer 1

A simple way that I used to solve this problem was

In my model I did:

class Article < ActiveRecord::Base
  has_many :posts

  def count_posts
    Post.where(:article_id => self.id).count
  end
end

Now, you can use for example:

Articles.first.count_posts

Im not sure if it can be more efficient way, But its a solution and in my opinion more elegant than the others.