将哈希转换为对象 [英] convert hash to object

问题描述

我正在尝试将哈希和嵌套哈希转换为对象.

I am trying to convert hash and nested hashes to objects.

到目前为止，第一个哈希对象已通过以下代码成功转换:

so far first hash object is converted successfully by this code:

class Hashit
  def initialize(hash)
    hash.each do |k,v|
      self.instance_variable_set("@#{k}", v)
      self.class.send(:define_method, k, proc{self.instance_variable_get("@#{k}")})
      self.class.send(:define_method, "#{k}=", proc{|v| self.instance_variable_set("@#{k}", v)})
    end
  end
end

但是问题是，我还想转换嵌套的哈希对象.但无法做到.

But problem is, i also want to convert nested hash objects. but couldn't make it.

h = Hashit.new({a: '123r', b: {c: 'sdvs'}})
 => #<Hashit:0x00000006516c78 @a="123r", @b={:c=>"sdvs"}> 

请参见@b={:c=>"sdvs"}此部分的输出.我也想将其转换为对象.如果可以的话，有可能吗?

see @b={:c=>"sdvs"} this part in output. I want also to convert it to object. is it possible if yes then how?

推荐答案

您需要添加递归性:

class Hashit
  def initialize(hash)
    hash.each do |k,v|
      self.instance_variable_set("@#{k}", v.is_a?(Hash) ? Hashit.new(v) : v)
      self.class.send(:define_method, k, proc{self.instance_variable_get("@#{k}")})
      self.class.send(:define_method, "#{k}=", proc{|v| self.instance_variable_set("@#{k}", v)})
    end
  end
end

h = Hashit.new({a: '123r', b: {c: 'sdvs'}})
# => #<Hashit:0x007fa6029f4f70 @a="123r", @b=#<Hashit:0x007fa6029f4d18 @c="sdvs">>

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