Puppet: nested hash/dict,array: how to access in erb?

arrays, dictionary, erb, puppet, ruby

Solution

Not sure what you are doing but there a few glaring issues like `@settings_value_hash` is not defined it would be `settings_value_hash` piped variable not instance variable. `@{settings_value_hash['machines']}` is in correct as well what happens if you run this

<% @settings.each do |settings_key, settings_value_hash| %>
  <%= "#{settings_value_hash['ip']}:#{settings_value_hash['port']}" %>
  option 
  <% settings_value_hash['option'].each do |option| %> 
    <%= option  %>   
  <% end %>
  <% settings_value_hash['machines'].each do |machine_key, machine_value_hash| %>
    server <%= "#{machine_key} #{machine_value_hash['ip']}:#{machine_value_hash['port']}" %>
  <% end %>
<% end %>

Also why is your initial hash set to a global `$settings` but you are accessing it through an instance variable `@settings`.

Problem

playing with puppet, I have ended up in a nested dictionary/hash - which looks more or less like ``` $settings = { "var1" => { "ip" => "0.0.0.0", "port" => "1234", "option" => ["foo", "bar"], "machines" => { "maschine-1" => { "ip" => "1.2.3.4", "port" => "1234"}, "maschine-2" => { "ip" => "1.2.3.5", "port" => "1235"}, } } } ``` however, I have not managed to parse properly it in the correspondig erb template. ``` <% @settings.each_pair do |settings_key, settings_value_hash| %> <%= settings_value_hash['ip']%>:<%= settings_value_hash['port'] %> option <% @settings_value_hash['option'].each do |option| -%> <%= option %> <% end -%> <% @{settings_value_hash['machines']}.each_pair do |machine_key, machine_value_hash| %> server <%= machine_key %> <%= machine_value_hash['ip'] %>:<%= machine_value_hash['port'] %> <% end %> ``` Thus, I can get the values in my top dictionary without problems, i.e., "ip" and "port", However, puppet throws me compile errors, when I try to get to the array "option" or the dict "machines" within the top dict. My guess at the moment is, that arrays and dicts/hashes are not "hashable" in Ruby/Puppet, or? Cheers and thanks for ideas, Thomas

Original source