sunspot-mongoid-adapter.rb

module MongoidAdapter
  class InstanceAdapter < Sunspot::Adapters::InstanceAdapter
    def id
      @instance.id
    end
  end

  class DataAccessor < Sunspot::Adapters::DataAccessor
    def load(id)
      @clazz.find(id)
    end
    
    def load_all(ids)
      @clazz.criteria.in(:_id => ids)
    end
  end
end

Sunspot::Adapters::DataAccessor.register(MongoidAdapter::DataAccessor, Operator)
Sunspot::Adapters::InstanceAdapter.register(MongoidAdapter::InstanceAdapter, Operator)