Ruby on Rails: alias_method_chain, what exactly does it do?

Question

I\'ve tried reading through various blog posts that attempt to explain alias_method_chain and the reasons to use it and not use it. In particular, I took heed to:

ht

Answer 1

alias_method_chain has been deprecated in Rails 5 in favour of Module#prepend.

Pull request: https://github.com/rails/rails/pull/19434

Changelog: https://github.com/rails/rails/blob/b292b76c2dd0f04fb090d49b90716a0e6037b41a/guides/source/5_0_release_notes.md#deprecations-4