Method: Chef::Node#deep_fetch!

Defined in:
lib/chef/sugar/node.rb

#deep_fetch!(*keys) ⇒ Object

Deeply fetch a node attribute by specifying a list of keys, bypassing Ruby’s Hash notation.

This method will raise any exceptions, such as undefined method ‘[]’ for nil:NilClass, just as if you used the native attribute notation. If you want a safely vivified hash, see #deep_fetch.

Examples:

Fetch a deeply nested key

node.deep_fetch(:foo, :bar, :zip) #=> node['foo']['bar']['zip']

Parameters:

  • keys (Array<String, Symbol>) —

    the list of keys to kdeep fetch

Returns:



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# File 'lib/chef/sugar/node.rb', line 73

def deep_fetch!(*keys)
  keys.map!(&:to_s)

  keys.inject(attributes.to_hash) do |hash, key|
    if hash.key?(key)
      hash[key]
    else
      raise AttributeDoesNotExistError.new(keys, key)
    end
  end
end