Ruby 列出资源的属性

我正在实现一个定制资源，它基本上是一个现有资源的门面（在下面的示例中是它的资源）

使用现有资源，此代码有效：

certificate = vault_certificate 'a common name' do
  combine_certificate_and_chain true
  output_certificates false # Just to decrease the chef-client run output
  vault_path "pki/issue/#{node['deployment']}"
end

template "a path" do
  source 'nginx/dummy.conf.erb'
  variables(
    certificate: certificate.certificate_filename
    key: certificate.key_filename
  )
end

请注意，我可以调用

certificate.certificate\u filename

或

certificate.key\u filename

。或者更一般地说，我可以读取vault_证书资源定义的任何属性

现在有了新的资源（有点像是vault_证书的门面）

如果我现在使用此资源并尝试调用

.certificate\u filename

或

.key\u filename

：

certificate = vault_certificate_handle_exceptions 'a common name' do
  action :create
end
template "a path" do
  source 'nginx/dummy.conf.erb'
  variables(
    certificate: certificate.certificate_filename
    key: certificate.key_filename
  )
end

我收到一个错误消息，表示未为

保险库\u证书\u句柄\u异常定义方法
证书\u文件名
（或
密钥\u文件名
）。为了解决这个问题，我采用了以下方法：

provides :vault_certificate_handle_exceptions

unified_mode true

property :common_name, String, name_property: true
property :max_retries, Integer, default: 5

action :create do
  require 'retries'
  # new_resource.max_retries is being used inside the retry_options. I omitted that part as its not relevant for the question
  with_retries(retry_options) do
    begin
      cert = vault_certificate new_resource.common_name do
        combine_certificate_and_chain true
        output_certificates false # Just to decrease the chef-client run output
        vault_path "pki/issue/#{node['deployment']}"
        ignore_failure :quiet
      end
      # These lines ensure we can read the vault_certificate properties as if they were properties of this resource (vault_certificate_handle_exceptions)
      Chef::ResourceResolver.resolve(cert.resource_name).properties.keys.each do |name|
        new_resource.send(:define_singleton_method, name.to_sym) do
          cert.send(name.to_sym)
        end
      end
    rescue Vault::HTTPClientError => e
      data = JSON.parse(e.errors)['data']
      if data['error'] == 'Certificate not found locally'
        # This error is one we can recover from (actually we are expecting it). This raise with VaultCertificateError will trigger the with_retries.
        raise VaultCertificateError.new("Waiting for the certificate to appear in the store (because I'm not the leader)", data)
      else
        # Any other error means something really went wrong.
        raise e
      end
    end
  end
end

有没有更干净的方法来实现这一点？如果没有，是否有更直接的方法列出资源的所有属性？我原以为
cert.properties
会管用，但运气不好

provides :vault_certificate_handle_exceptions

unified_mode true

property :common_name, String, name_property: true
property :max_retries, Integer, default: 5

action :create do
  require 'retries'
  # new_resource.max_retries is being used inside the retry_options. I omitted that part as its not relevant for the question
  with_retries(retry_options) do
    begin
      cert = vault_certificate new_resource.common_name do
        combine_certificate_and_chain true
        output_certificates false # Just to decrease the chef-client run output
        vault_path "pki/issue/#{node['deployment']}"
        ignore_failure :quiet
      end
      # These lines ensure we can read the vault_certificate properties as if they were properties of this resource (vault_certificate_handle_exceptions)
      Chef::ResourceResolver.resolve(cert.resource_name).properties.keys.each do |name|
        new_resource.send(:define_singleton_method, name.to_sym) do
          cert.send(name.to_sym)
        end
      end
    rescue Vault::HTTPClientError => e
      data = JSON.parse(e.errors)['data']
      if data['error'] == 'Certificate not found locally'
        # This error is one we can recover from (actually we are expecting it). This raise with VaultCertificateError will trigger the with_retries.
        raise VaultCertificateError.new("Waiting for the certificate to appear in the store (because I'm not the leader)", data)
      else
        # Any other error means something really went wrong.
        raise e
      end
    end
  end
end