as_json

# File activesupport/lib/active_support/core_ext/object/json.rb, line 175
  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 = {}
    if options
      options = options.dup.freeze unless options.frozen?
      subset.each { |k, v| result[k.to_s] = v.as_json(options) }
    else
      subset.each { |k, v| result[k.to_s] = v.as_json }
    end
    result
  end