在 Puppet Hash 中查找包含特定键值对的键

Question

我还是 Puppet 的初学者。所以请多多包涵。假设我通过某个模块在 Puppet 中创建了这个哈希

account = {
  user@desktop1 => { 
      owner => john, 
      type => ssh-rsa, 
      public => SomePublicKey
  }, 
  user@desktop2 => {
    owner => mary, 
    type => ssh-rsa, 
    public => SomePublicKey
  }, 
  user@desktop3 => {
    owner => john, 
    type => ssh-rsa, 
    public => SomePublicKey
  }, 
  user@desktop4 => {
    owner => matt, 
    type => ssh-rsa, 
    public => SomePublicKey
  }
}

我如何找到散列中特定键和值对的键？在这种情况下，例如我想找到 john 拥有的所有密钥。所以预期的结果是这样的： [user@desktop1, user@desktop3]

提前致谢

Answer 1

https://ruby-doc.org/core-2.5.1/Hash.html#method-i-select

account.select {|key, value| value['owner'] == 'john'}.keys

Answer 2

问题询问如何在 Puppet 中执行此操作，但令人困惑的是，哈希是 Ruby 哈希，问题也有一个 Ruby 标记。

无论如何，这就是你在 Puppet 中的做法：

$account = {
  'user@desktop1' => {
    'owner' => 'john',
    'type'  => 'ssh-rsa',
    'public' => 'SomePublicKey',
  },
  'user@desktop2' => {
    'owner' => 'mary',
    'type'  => 'ssh-rsa',
    'public' => 'SomePublicKey',
  },
  'user@desktop3' => {
    'owner' => 'john',
    'type'  => 'ssh-rsa',
    'public' => 'SomePublicKey',
  },
  'user@desktop4' => {
    'owner' => 'matt',
    'type'  => 'ssh-rsa',
    'public' => 'SomePublicKey',
  }
}

$users = $account.filter |$k, $v| { $v['owner'] == 'john' }.keys

notice($users)

Puppet 应用导致：

Notice: Scope(Class[main]): [user@desktop1, user@desktop3]

Answer 3

使用 Enumerable#each_with_object 的另一个选项：

account.each_with_object([]) { |(k, v), a| a << k if v['owner'] == 'john'}
#=> ["user@desktop1", "user@desktop3"]

假设键和值是 String。

在 Puppet Hash 中查找包含特定键值对的键

Find key contain specific key value pair in Puppet Hash

puppet