QueryObject as Decorator for relation

gistfile1.md

class TestQuery < SimpleDelegator
  def initialize
    super(Bomb.all.extending(Scopes))
  end
  module Scopes
    def processed
      where(Bomb.arel_table[:asset_remote_url].eq(nil))
    end
  end
end

q = TestQuery.new 

q.__getobj__.class    # <= q is a decorated Active Record Association Relation
=> Bomb::ActiveRecord_Relation

q.to_sql
=> "SELECT \"bombs\".* FROM \"bombs\""

q.processed.to_sql
=> "SELECT \"bombs\".* FROM \"bombs\" WHERE \"bombs\".\"asset_remote_url\" IS NULL"