Boolean check if a rails engine is mounted?

Question

I have split one of my larger projects up into mountable rails engines and I want to find a method that checks if a rails engine is mounted. As an example I have a User class in my main app

user.rb

class User < ApplicationRecord
    has_many :searches, as: :searchable, class_name: MySearchEngine::Search
end

I would like to wrap this has_many association as well as other code for the integration of the engine in an if statement so that it only adds the code if MySearchEngine has been mounted

Answer 1

You should be able to check whether they are available by defined? MySearchEngine::Search defined? MySearchEngine::Search