Greetings

Hey my favorite devs, how's it going?
Hope you're good.

Let's get down to business. Shall we?

Introduction

FriendlyId is an amazing Ruby gem that is responsible for slugging and permalink plugins for Active Record. It lets you create pretty URLs and work with human-friendly strings as if they were numeric ids.

Error

This is the usual error message:

uninitialized constant #<Class:0x00007f616c033c50>::FriendlyId

Here, my environment configuration is with Rails 6.1.6.1 and friendly_id 5.2.4.

Solutions

1. Check if you have a typo

Come back to the FriendlyId's github page and follow the steps again, I mean, check your controller and model code.

2. Restart the Rails server

On console, run

1. CTRL + C to stop the server (in case your server is running);
2. rails s to start the server again

For me, the solution was this.

Conclusion

That's all. Hope you guys liked it. Let me know if you need any help.