How to Determine if Rails Association is Eager Loaded?

Question

Does anyone know a way to determine if a Rails association has been eager loaded?

My situation: I have a result set where sometimes one of the associations is eager l

Answer 1

Solution to this problem should be foo.association(:bla).loaded?, BUT it works incorrectly - it checks and marks association as dirty:

class Foo; has_one :bla, :autosave => true end
foo.association(:bla).loaded? #=> false
foo.save # saves foo and fires select * from bla

So I've added following extension to ActiveRecord:

module ActiveRecord
  class Base
    def association_loaded?(name)
      association_instance_get(name).present?
    end
  end
end

and now:

class Foo; has_one :bla, :autosave => true end
foo.association_loaded?(:bla) #=> false
foo.save # saves foo