Remote ActiveRecord relation (over network)


I have a has and belongs to many relation between User and Article models, and I would like to link them even if an article if not hosted on the same database then a user.

For example, If an article exists at and a user exists at, If would like to be able to do from web interface or web interface this kind of query: a_user.articles (or an_article.users).

I think this can be possible adding a field like "url" in users and articles tables. But I don't know how to process for ActiveRecord. My Article model looks like this:

class Article < ActiveRecord::Base   has_and_belongs_to_many :users end

Is there yet some example of project using this kind of relation over internet?

Many thanks