Methods

Constants

DATETIME_REGEX = /\A(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[T \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?)?)\z/
DATE_REGEX = /\A\d{4}-\d{2}-\d{2}\z/
 

matches YAML-formatted dates

Class Public methods

decode(json)

Parses a JSON string (JavaScript Object Notation) into a hash. See www.json.org for more info.

ActiveSupport::JSON.decode("{\"team\":\"rails\",\"players\":\"36\"}")
=> {"team" => "rails", "players" => "36"}
📝 Source code 
# File activesupport/lib/active_support/json/decoding.rb, line 22
      def decode(json)
        data = ::JSON.parse(json, quirks_mode: true)

        if ActiveSupport.parse_json_times
          convert_dates_from(data)
        else
          data
        end
      end
🔎 See on GitHub

encode(value, options = nil)

Dumps objects in JSON (JavaScript Object Notation). See www.json.org for more info.

ActiveSupport::JSON.encode({ team: 'rails', players: '36' })
# => "{\"team\":\"rails\",\"players\":\"36\"}"
📝 Source code 
# File activesupport/lib/active_support/json/encoding.rb, line 21
    def self.encode(value, options = nil)
      Encoding.json_encoder.new(options).encode(value)
    end
🔎 See on GitHub

parse_error()

Returns the class of the error that will be raised when there is an error in decoding JSON. Using this method means you won’t directly depend on the ActiveSupport’s JSON implementation, in case it changes in the future.

begin
  obj = ActiveSupport::JSON.decode(some_string)
rescue ActiveSupport::JSON.parse_error
  Rails.logger.warn("Attempted to decode invalid JSON: #{some_string}")
end
📝 Source code 
# File activesupport/lib/active_support/json/decoding.rb, line 42
      def parse_error
        ::JSON::ParserError
      end
🔎 See on GitHub