Avoid unnecessary sql execution

[inkstak]

Hi,

When I'm using the :through option, in a load_and_authorize_resource, with ActiveRecord 3, I can see unexpected SQL queries in my log tail.

load_and_authorize_resource :ufo, through: :mothership

It seems to come from resource_base.respond_to?(:accessible_by).

You can try in a rails console :
mothership.ufos.respond_to?(:accessible_by)
=> # fire the SQL query and load all ufos

mothership.ufos.scoped.respond_to?(:accessible_by)
=> # wont fire anything

However, it works well with AR 4.

[rposborne]

+1

[matt-glover]

Related #398 and all of the associated issues.