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Methods
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Constants
DATE_REGEX = /^(?:\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})?))$/
 

matches YAML-formatted dates

Class Public methods
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\"}"
# File activesupport/lib/active_support/json/encoding.rb, line 20
def self.encode(value, options = nil)
  Encoding.json_encoder.new(options).encode(value)
end
Instance Public methods
decode(json, options = {})

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"}
# File activesupport/lib/active_support/json/decoding.rb, line 19
def decode(json, options = {})
  if options.present?
    raise ArgumentError, "In Rails 4.1, ActiveSupport::JSON.decode no longer "              "accepts an options hash for MultiJSON. MultiJSON reached its end of life "              "and has been removed."
  end

  data = ::JSON.parse(json, quirks_mode: true)

  if ActiveSupport.parse_json_times
    convert_dates_from(data)
  else
    data
  end
end
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
# File activesupport/lib/active_support/json/decoding.rb, line 45
def parse_error
  ::JSON::ParserError
end