class DateTime
def as_json(*)
DateTime.json_create(x) # BUG? Raises Date::Error "invalid date"
\Method +JSON.create+ deserializes such a hash, returning a \DateTime object:
# => {"json_class"=>"DateTime", "y"=>2023, "m"=>11, "d"=>21, "sg"=>2299161.0}
x = DateTime.now.as_json
require 'json/add/datetime'
returning a 2-element hash representing +self+:
\Method DateTime#as_json serializes +self+,
see Marshal[https://docs.ruby-lang.org/en/master/Marshal.html].
to serialize and deserialize a \DateTime object;
Methods DateTime#as_json and +DateTime.json_create+ may be used
def as_json(*) { JSON.create_id => self.class.name, 'y' => year, 'm' => month, 'd' => day, 'H' => hour, 'M' => min, 'S' => sec, 'of' => offset.to_s, 'sg' => start, } end