class Date - json: Ruby Standard Library Documentation

# class Date

### Public Class Methods

json_create(object) click to toggle source

See `as_json`.

    # File json/lib/json/add/date.rb, line 10
    def self.json_create(object)
      civil(*object.values_at('y', 'm', 'd', 'sg'))
    end

### Public Instance Methods

as_json(*) click to toggle source

Methods `Date#as_json` and `Date.json_create` may be used to serialize and deserialize a Date object; see Marshal.

Method `Date#as_json` serializes `self`, returning a 2-element hash representing `self`:

    require 'json/add/date'
    x = Date.today.as_json
    # => {"json_class"=>"Date", "y"=>2023, "m"=>11, "d"=>21, "sg"=>2299161.0}

Method `JSON.create` deserializes such a hash, returning a Date object:

    Date.json_create(x)
    # => #<Date: 2023-11-21 ((2460270j,0s,0n),+0s,2299161j)>

    # File json/lib/json/add/date.rb, line 32
    def as_json(*)
      {
        JSON.create_id => self.class.name,
        'y' => year,
        'm' => month,
        'd' => day,
        'sg' => start,
      }
    end

to_json(*args) click to toggle source

Returns a `JSON` string representing `self`:

    require 'json/add/date'
    puts Date.today.to_json

Output:

    {"json_class":"Date","y":2023,"m":11,"d":21,"sg":2299161.0}

    # File json/lib/json/add/date.rb, line 51
    def to_json(*args)
      as_json.to_json(*args)
    end