如何在给定嵌套键的 Ruby 哈希中获取和设置值？

Question

我用 vine gem 尝试过这样的事情，但没有用。有没有其他聪明的方法 注意我不想像here那样使用复杂的哈希类

require 'vine'
require 'json'

json = '{
   "name":"John",
   "address":{
      "street":"street 1",
      "country":"country1"
   },
   "phone_numbers":[
      {
         "type":"mobile",
         "number":"234234"
      },
      {
         "type":"fixed",
         "number":"2342323423"
      }
   ]
}'

h = JSON.parse(json)

{"name"=>"John", "address"=>{"street"=>"street 1", "country"=>"country1"}, "phone_numbers"=>[{"type"=>"mobile", "number"=>"234234"}, {"type"=>"fixed", "number"=>"2342323423"}]}

a = h.access("phone_numbers.0.type")

mobile

b = h.set("phone_numbers.0.type", "tablet")

{"name"=>"John", "address"=>{"street"=>"street 1", "country"=>"country1"}, "phone_numbers"=>{0=>{:type=>"tablet"}}}

预期结果是

{"name"=>"John", "address"=>{"street"=>"street 1", "country"=>"country1"}, "phone_numbers"=>[{"type"=>"tablet", "number"=>"234234"}, {"type"=>"fixed", "number"=>"2342323423"}]}

它不适用于数组，或者我遗漏了一些东西 谢谢

Answer 1

试试下面的：

require 'json'

#considering that the json is same as you mentioned in the question

h = JSON.parse(json)

# For accessing name 
p h['name']
#for changing the name 
h['name'] = 'ABC'

# for getting address
p h['address']['street']
# for setting address 
h['address']['street'] = "my street"

#get phone number
h['phone_numbers'].each do |ph|
  p ph['type']
  #Set mobile number
  ph['number'] = "123"
end

在上面，您在json 中收到了一个对象。

但是如果你收到多个对象，那么像下面这样解析它们

json_array = JSON.parse(json)

json_array.each do |h|
 #All the above steps will remain same
end