Class alias in Ruby

Question

I am developing a new Rails app based on a similar existing one. In my old app, I have Coupon class, which is very similar to Ticket in my new app. I want to reuse all code

Answer 1

Anyone coming here looking for how to alias a rails model class to have a new name:

I was able to simply do Foo = Bar, but had to put Foo inside it's own model file so that I wouldn't get a Uninitialized Constant Error. e.g.

# models/foo.rb
Foo = Bar

Also you may find weirdness trying to use the alias in associations like has_many, has_one etc. I've found you can usually get around those by using the root namespace (or appropriate namespace depending on how your models are structured) to make sure Rails is trying to autoload the right constant:

has_many :foo, class_name: '::Foo'