Call Montréal, Canada 524-949-6869

Blog

Thursday, October 21, 2010

ActiveRecord::Base#becomes

An ActiveRecord method I did not existed: becomes.

Returns an instance of the specified klass with the attributes of the current record. This is mostly useful in relation to single-table inheritance structures where you want a subclass to appear as the superclass. This can be used along with record identification in Action Pack to allow, say, Client < Company to do something like render :partial => @client.becomes(Company) to render that instance using the companies/company partial instead of clients/client. Note: The new instance will share a link to the same attributes as the original class. So any change to the attributes in either instance will affect the other.

Developing Ruby on Rails applications and custom Content Management Systems in Montréal. Contact Firsthand.