as_json

# File activesupport/lib/active_support/json/encoding.rb, line 225 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.wrap(attrs)) elsif attrs = options[:except] except(*Array.wrap(attrs)) else self end else self end # use encoder as a proxy to call as_json on all values in the subset, to protect from circular references encoder = options && options[:encoder] || ActiveSupport::JSON::Encoding::Encoder.new(options) result = self.is_a?(ActiveSupport::OrderedHash) ? ActiveSupport::OrderedHash : Hash result[subset.map { |k, v| [k.to_s, encoder.as_json(v, options)] }] end