Modified the access to var options when load record

def self.load(options = {})
          options[:data] = options['data'] if options['data']
          options[:_id] = options['_id'] if options['_id']
          options[:created_at] = options['created_at'] if options['created_at']
          options[:updated_at] = options['updated_at'] if options['updated_at']
          new(options)
        end