自动将JSON对象映射到Ruby中的实例变量 [英] Automatically Map JSON Objects into Instance Variables in Ruby

问题描述

我希望能够自动将JSON对象解析为实例变量.例如，使用此JSON.

I would like to be able to automatically parse JSON objects into instance variables. For example, with this 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}

我希望能够做到这一点:

I'd like to be able to do this:

json.shots_count

并输出:

150

我怎么可能这样做?

推荐答案

您绝对应该使用类似json["shots_counts"]的名称，但是如果您确实需要对象化的哈希，则可以为此创建一个新类:

You should definitely use something like json["shots_counts"], but if you really need objectified hash, you could create a new class for this:

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

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