Rails counter_cache not updating correctly

Question

Using Rails 3.1.3 and I\'m trying to figure out why our counter caches aren\'t being updated correctly when changing the parent record id via update_attributes.

Answer 1

The counter_cache function is designed to work through the association name, not the underlying id column. In your test, instead of:

registration.update_attributes(:event_id => other_event.id)

try

registration.update_attributes(:event => other_event)

More information can be found here: http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html