Extra Model Attributes from DB

We have two models, Articles and Votes; it’s the typical situation;
users can vote on articles so the models look something like this:

class Article < ActiveRecord::Base

has_many :votes


class Vote < ActiveRecord::Base

belongs_to :user
belongs_to :article


(user isn’t listed here because it’s not important but you get the

What we want to do is actually get back the number of votes with the

The SQL for this is pretty straight forward and looks like:

SELECT articles.*, COUNT(votes.id) AS vote_count FROM
  articles INNER JOIN votes ON articles.id = votes.article_id
GROUP BY articles.id

We’d like to be able to then do something like

Article.find(:all, :order => “vote_count DESC”)


<%= Article.find(125).vote_count %>

problem is, we can’t work out if it’s even possible in Rails to make
the Article model use this SQL, or if there’s another solution we’re
Does anyone know if it can be done or could point us in the right


This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs