Wisper as an alternative to the Observer Design Pattern on Rubyonrails

Question

I’m trying to implement the Wisper as an alternative to the Observer Design Pattern that was discontinued from Ruby.

The error is: Wrong number of Arguments (Given 1, expected 0)

The method I created is basically to run a puts "A restaurant has received a rating".

I’m studying the Caelum RR77 booklet.

https://gist.github.com/emanoelopes/7bf3d5fcbf1a6f1a44d199dcceefa0f9

Answer 1

We did. The code is available in: https://github.com/emanoelopes/cp2-rails/tree/master/cp2-caelum-apostila/vota_prato