Why doesn't "not" work in constraints in rails routing?

Question

Ruby on Rails

Hello!
Here is the route.rb part:

Rails.application.routes.draw do
  authorized     = ->(request) { request.session[:user_id].present? }
  constraints !authorized do
    ...
  end

  constraints authorized do
    ...
  end
end

doesn't work like that. Routes from the first block always work. Even when there is a value in the session.
If you write the second lambda:

not_authorized = ->(request) { request.session[:user_id].blank? }

and "get involved" on it, then everything works.
Please tell me why is that?

Answer 1

Your `authorized` is a lambda. That is, this is a function that will be executed every time the request comes to rails.
And this `!authorized`, this is the negation of the lambda, it will always be false. This is not a negation of the result of executing the lambda, it is a negation of the lambda object itself.

2.3.1 :001 > ->() { false }
 => #<Proc:[email protected](irb):1 (lambda)>
2.3.1 :002 > !(->() { false })
 => false

Answer 2

authorized = request.session[:user_id].present? ? request.session[:user_id] : nil
if authorized
  Айди есть
else
  айди нет
end