Rails engine: get parent app's name

Question

I would like to know if a mountable Rails engine can retrieve the name of the parent application on which it is mounted.

I have looked through the official Rails engine guide, but could not find anything. Any sources or ideas?

Answer 1

I'm surprised no one answered this in more than a year. You can use:

Rails.application.class.parent.name

Depending on where you use it you might need to make sure you start at the root rails module which makes this a safer choice:

::Rails.application.class.parent.name