Struct 将ruby结构转换为yaml

我在ruby中有一个结构，如下所示：

Struct.new("Device", :brand, :model, :port_id)
@devices = [
 Struct::Device.new('Apple', 'iphone5', 3),
 Struct::Device.new('Samsung', 'Galaxy S4', 1)
]

将其转换为_yaml会得到以下结果：

---
- !ruby/struct:Struct::Device
  brand: Apple
  model: iphone5
  port_id: 3
- !ruby/struct:Struct::Device
  brand: Samsung
  model: Galaxy S4
  port_id: 1

然而，每当我需要在代码中使用我的结构时，我仍然不知道如何从yaml转换回它。当我在yaml代码上添加

devices:

，然后尝试从CONFIG['devices']变量将其解析回ruby struct时，我没有得到任何结果

---

任何帮助都将不胜感激

我没有看到你的问题：

irb(main):001:0> require 'yaml'
=> true
irb(main):002:0> Struct.new("Device", :brand, :model, :port_id)
=> Struct::Device
irb(main):003:0> devices = [
irb(main):004:1*  Struct::Device.new('Apple', 'iphone5', 3),
irb(main):005:1*  Struct::Device.new('Samsung', 'Galaxy S4', 1)
irb(main):006:1> ]
=> [#<struct Struct::Device brand="Apple", model="iphone5", port_id=3>, #<struct Struct::Device brand="Samsung", model="Galaxy S4", port_id=1>]
irb(main):007:0> y = devices.to_yaml
=> "---\n- !ruby/struct:Struct::Device\n  brand: Apple\n  model: iphone5\n  port_id: 3\n- !ruby/struct:Struct::Device\n  brand: Samsung\n  model: Galaxy S4\n  port_id: 1\n"
irb(main):008:0> obj = YAML::load(y)
=> [#<struct Struct::Device brand="Apple", model="iphone5", port_id=3>, #<struct Struct::Device brand="Samsung", model="Galaxy S4", port_id=1>]

和

test.rb

：

require 'yaml' 
Struct.new("Device", :brand, :model, :port_id)
CONFIG = YAML::load_file('./config.yml') unless defined? CONFIG 
devices = CONFIG['devices']
puts devices.inspect

结果:

C:\>ruby test.rb
[#<struct Struct::Device brand="Apple", model="iphone5", port_id=3>, #<struct Struct::Device brand="Samsung", model="Galaxy S4", port_id=1>]

C:\>ruby test.rb
[#, #]

谢谢，我想我的问题更像这样：如果我最初在config.yml文件中有yaml格式的结构，我如何正确读取它？我现在的方式是这样的：config.yml

devices:-！ruby/struct:struct:：设备品牌：苹果型号：iphone5端口号：3-！ruby/struct:struct:：设备品牌：三星型号：Galaxy S4端口id:1

test.rb

require'yaml'CONFIG=yaml.load_文件（'./CONFIG.yml'），除非定义？CONFIG devices=CONFIG['devices']然后当我放置设备时，

put devices`我无法得到任何结果。@user2175891您应该阅读答案！您缺少

Struct

定义。这是您尝试加载之前需要的。这也是YAML的一个小问题。请参阅我的附加代码。@user2175891如果答案有用，最好接受它。

C:\>ruby test.rb
[#<struct Struct::Device brand="Apple", model="iphone5", port_id=3>, #<struct Struct::Device brand="Samsung", model="Galaxy S4", port_id=1>]