module ActiveRecord::Delegation::ClassSpecificRelation

def method_missing(method, *args, &block)
  if @klass.respond_to?(method)
    self.class.delegate_to_scoped_klass(method)
    scoping { @klass.send(method, *args, &block) }
  elsif Array.method_defined?(method)
    self.class.delegate method, :to => :to_a
    to_a.send(method, *args, &block)
  elsif arel.respond_to?(method)
    self.class.delegate method, :to => :arel
    arel.send(method, *args, &block)
  else
    super
  end
end