as_json

# File activesupport/lib/active_support/core_ext/object/json.rb, line 172
  def as_json(options = nil) # :nodoc:
    # create a subset of the hash by applying :only or :except
    subset = if options
      if attrs = options[:only]
        slice(*Array(attrs))
      elsif attrs = options[:except]
        except(*Array(attrs))
      else
        self
      end
    else
      self
    end

    result = {}
    subset.each do |k, v|
      result[k.to_s] = options ? v.as_json(options.dup) : v.as_json
    end
    result
  end