Question

I’m looking for a way to list all classes defined inside a module (namespace).
Here is similar question regarding the problem:
How to get all class names in a namespace in Ruby?

but see the last reply, the Module.constants is empty until the class is called/loaded. Is there any way to do this without manually referencing each class?

I’m trying to use this feature in Rails 3.2, and the only way I found was requiring each class in initializer (didn’t try it but it still requires manual typing…).

Thanks in advance for your time.

Answer 1

You could glob the files in a namespaced directory as such:

Dir.glob('/path/to/namespaced/directory/*').collect{|file_path| File.basename(file_path, '.rb').constantize}

So in a Rails initialization file or model you could do:

Dir.glob(File.join(Rails.root, "app", "models", "my_namespace", "*")).collect{|file_path| File.basename(file_path, '.rb').constantize}