I'm trying to write an if statement that compares two variables in a puppet erb template:
<% @array_of_ip_addresses.each_with_index do |ip, idx| -%>
<% if @ip == @ipaddress_eth0 -%>
<%= "doing something with #{idx}" -%>
<% end -%>
<% end -%>
I cannot figure out why, but the condition on my if statement keeps returning false (needless to say I confirmed there should be a match).
What dumb thing am I missing?
ip is a block scope variable and not a variable instantiated from the invoking code (in this case, Puppet's template function), so you should not specify it as a class instance variable with @. When you remove that and specify it as a block scope variable ip, the template will look like:
<% @array_of_ip_addresses.each_with_index do |ip, idx| -%>
<% if ip == @ipaddress_eth0 -%>
<%= "doing something with #{idx}" -%>
<% end -%>
<% end -%>
Using the class instance variable @ip would likely result in a resolution of nil, which would definitely almost always be false as nil != @ipaddress_eth0 unless Facter failed to resolve a value for your eth0 ipaddress, which would be quite uncommon (but still possible).
