How rails can use other orm's generator
I’m just suddenly curious about this, so I looked up a little about Rails source code.
I found this code is how it get the other ORM class.
"#{options[:orm].to_s.camelize}::Generators::ActiveModel".constantizeThen I checked mongoid, found it has the class: Mongoid::Generators::ActiveModel in lib/rails/mongoid_generator.rb.