define_method :"bulk_get_#{method_name}" do |objects, &block|
  keys_objects_map = objects.inject({}) do |h, o|
    h[o.method_cache_key_for(method_name)] = o
    h
  end

  keys = keys_objects_map.keys
  result = $dalli.get_multi(keys)
  missing_keys = keys - result.keys
  if missing_keys.any?
    if block.nil?
      # Call the object.send(method_name) directly
      missing_keys.each do |key|
        result[key] = keys_objects_map[key].send(method_name)
      end
    else
      missing_ids = missings_keys.collect {|key| keys_objects_map[key].id}
      block.call(missing_ids).each do |key, value|
        result[key] = v
      end
    end
  end
  objects.collect {|o| result[o.method_cache_key_for(method_name)]}
end