Default scope with Sunspot blog post: 2010/01/15/default-scope-with-sunspot/

DefaultScope.rb

class Item
  # simple default scope to add an order_by to all queries
  def self.default_search_scope(&additional)
    search = Sunspot.new_search(Item)
    search.build(&additional)
    search.build do
      order_by :created_at, :desc
    end
    search.execute
    search.results
  end
  
  # pardon the contrived example
  def self.with_keywords(user, query)
    default_search_scope do
      keywords query
    end
  end
end