Rails app gems unaware of `Rails.application` in config files; is nil

[umdstu]

After implementing this gem and the required changes, I verified everything worked. I then added a custom gem to the Gemfile that happens to load one of the config/*.yml files. As expected, the yml file has
<%= Rails.application.secrets.key_name %>

but when the gem tries to load the yml, It errors:

undefined method  `secrets' for nil:NilClass (NoMethodError) 

Is there a way to make the gem aware of Rails.application?

[pixeltrix]

The only way I can think of is you need to load Rails before the gem tries to load the YAML file - without seeing the Gemfile, etc it's hard to say whether it's possible