It appears that this method has simply been moved to the module ActiveRecord::Calculations::ClassMethods.
You can still use the example listed in the docs here, it will simply call
the method ActiveRecord::Calculations::ClassMethods#count.
APIdock release: IRON STEVE (1.4)
If you have any comments, ideas or feedback, feel free to contact us at
APIdock copyright Nodeta Oy 2008-2015
Flowdock is a collaboration tool for technical teams. Version control, project management, deployments and your group chat in one place.