在Ruby中自动将JSON对象映射到实例变量

我希望能够自动将 JSON对象解析为实例变量.例如,使用此JSON.

require 'httparty'

json = HTTParty.get('http://api.dribbble.com/players/simplebits') #=> {"shots_count":150,"twitter_screen_name":"simplebits","avatar_url":"http://dribbble.com/system/users/1/avatars/thumb/dancederholm-peek.jpg?1261060245","name":"Dan Cederholm","created_at":"2009/07/07 21:51:22 -0400","location":"Salem,MA","following_count":391,"url":"http://dribbble.com/players/simplebits","draftees_count":104,"id":1,"drafted_by_player_id":null,"followers_count":2214}

我希望能够这样做：

json.shots_count

并输出：

150

我怎么可能这样做？

解决方法

你绝对应该使用类似json [“shots_counts”]的东西,但如果你真的需要客观化的哈希,你可以为此创建一个新类：

class ObjectifiedHash

    def initialize hash
        @data = hash.inject({}) do |data,(key,value)|  
            value = ObjectifiedHash.new value if value.kind_of? Hash
            data[key.to_s] = value
            data
        end
    end

    def method_missing key
        if @data.key? key.to_s
            @data[key.to_s]
        else
            nil
        end
    end

end

之后,使用它：

ojson = ObjectifiedHash.new(HTTParty.get('http://api.dribbble.com/players/simplebits'))
ojson.shots_counts # => 150