Module: ActiveSupport::JSON

Relationships & Source Files
Namespace Children
Modules: `Encoding`
Defined in:	activesupport/lib/active_support/json/decoding.rb, activesupport/lib/active_support/json/encoding.rb

Constant Summary

DATETIME_REGEX =
# File 'activesupport/lib/active_support/json/decoding.rb', line 14

/\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 =

matches YAML-formatted dates

# File 'activesupport/lib/active_support/json/decoding.rb', line 13
```
/\A\d{4}-\d{2}-\d{2}\z/
```

Class Method Summary

.decode(json) (also: .load)

Parses a JSON string (JavaScript ::Object Notation) into a hash.
.dump(value, options = nil)

Alias for .encode.
.encode(value, options = nil) (also: .dump)
.load(json)

Alias for .decode.
.parse_error

Returns the class of the error that will be raised when there is an error in decoding JSON.
.convert_dates_from(data) private

Class Method Details

.convert_dates_from(data) (private)

[ GitHub ]

# File 'activesupport/lib/active_support/json/decoding.rb', line 48


def convert_dates_from(data)
  case data
  when nil
    nil
  when DATE_REGEX
    begin
      Date.parse(data)
    rescue ArgumentError
      data
    end
  when DATETIME_REGEX
    begin
      Time.zone.parse(data)
    rescue ArgumentError
      data
    end
  when Array
    data.map! { |d| convert_dates_from(d) }
  when Hash
    data.transform_values! do |value|
      convert_dates_from(value)
    end
  else
    data
  end
end

.decode(json) Also known as: .load

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"}

[ GitHub ]

# 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

.dump(value, options = nil)

Alias for .encode.

[ GitHub ]

# File 'activesupport/lib/active_support/json/encoding.rb', line 25


alias_method :dump, :encode

.encode(value, options = nil) Also known as: .dump

[ GitHub ]

# File 'activesupport/lib/active_support/json/encoding.rb', line 22


def encode(value, options = nil)
  Encoding.json_encoder.new(options).encode(value)
end

.load(json)

Alias for .decode.

[ GitHub ]

# File 'activesupport/lib/active_support/json/decoding.rb', line 31


alias_method :load, :decode

.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

[ GitHub ]

# File 'activesupport/lib/active_support/json/decoding.rb', line 43


def parse_error
  ::JSON::ParserError
end