橋本商会

こういうjsonへのシリアライズ方法が書かれてないクラスを使って、to_jsonすると

#!/usr/bin/env ruby
require 'rubygems'
require 'json'

class User
  attr_reader :id, :name
  def initialize(id, name)
    @id = id
    @name = name
  end
end

users = Array.new
['user1', 'user2', 'shokai'].each_with_index{|name,id|
  users.push User.new(id, name)
}

puts users.to_json

クラス名が出てきてしまう

["#<User:0x007fc17b8bda50>","#<User:0x007fc17b8bda28>","#<User:0x007fc17b8bda00>"]

JSON implementation for Rubyに、to_json(*a)を定義しろって書いてあった

#!/usr/bin/env ruby
require 'rubygems'
require 'json'

class User
  attr_reader :id, :name
  def initialize(id, name)
    @id = id
    @name = name
  end

  ## JSON作る
  def to_json(*a)
    {
      :id => @id,
      :name => @name
    }.to_json(*a)
  end
end

users = Array.new
['user1', 'user2', 'shokai'].each_with_index{|name,id|
  users.push User.new(id, name)
}

puts users.to_json

ちゃんと出てきた

[{"id":0,"name":"user1"},{"id":1,"name":"user2"},{"id":2,"name":"shokai"}]