Check for attribute in Chef recipe: Not an easy task

The doc says n.attributes?(“hostname”), but that failed me and took some time to understand. I had to check for nilness, too:

if ! (n.attributes?(“hostname”) and n[‘hostname’] != nil)
  Chef::Log.info(“Not adding node: #{n} – no hostname. Not bootstrapped correctly?”)
  next
else
  Chef::Log.info(“Found hostname attr for #{n}”)
end