Why doesn't friendly_id work?

Question

Ruby on Rails

added gem

gem 'friendly_id', '~> 5.1'

fulfilled

rails generate friendly_id
rails generate migration add_slug_to_posts slug:string:uniq

model

class Post < ActiveRecord::Base
  extend FriendlyId
  friendly_id :title, use: :slugged,
. . . 
end

controller

class PostsController < ApplicationController
   def show
    @post = Post.friendly.find(params[:id])
    @postCreator = User.find(@post.user_id)
  end
. . .
end

It is paradoxical that everything works through the console

And here's

How to solve the problem?

Answer 1

Solved the problem by adding :finders to the use array:
Now it looks like this

class Post < ActiveRecord::Base
  extend FriendlyId
  friendly_id :title, use: [:slugged, :finders] 
. . . 
end

I also removed .friendly from the action and just use
I don't quite understand how, but it helped.
I hope it will be useful to someone.