Symbol is passed to 'raise'

Question

Code for context:

module Devise
  module Strategies
    class AuthxAuthenticatable < Authenticatable
      def valid?
        !params[scope].nil?
      end

      def authenticate!
        resource = mapping.to.authenticate_with_credentials(params[scope])
        return fail(:invalid) if resource.nil?
        success!(resource) if validate(resource)
      end
    end
  end
end

Warden::Strategies.add(:authx_authenticatable, Devise::Strategies::AuthxAuthenticatable)

Came across some code where a symbol is passed to raise:

raise(:invalid)

Doesn't look like there's any monkey patching of raise to handle symbol arguments. Seems like fail used to be used, and the code actually works if I use fail.

Isn't that just an alias for raise? Does this make sense in any context?

Yeah that should throw a `TypeError` with either `fail` or `raise`. Can you give more context? Any gems at play? — hoffm, Oct 18 '17 at 15:48
Thanks @hoffm. And yeah that's what I was thinking, posted some additional code above, essentially it's just a custom strategy for Devise — Drew, Oct 18 '17 at 15:50
@hoffm looks like devise is using that syntax in some of its code as well — Drew, Oct 18 '17 at 15:53
What version of Devise are you using? Looks like the latest doesn't do that https://github.com/plataformatec/devise/search?q=%22raise%22&type=&utf8=%E2%9C%93 — hoffm, Oct 18 '17 at 15:54
@hoffm looks like it's mapped to the https://github.com/plataformatec/devise/blob/master/config/locales/en.yml file — Drew, Oct 18 '17 at 15:55
@hoffm sorry, looks like they're using it with the fail method https://github.com/plataformatec/devise/blob/88724e10adaf9ffd1d8dbfbaadda2b9d40de756a/lib/devise/strategies/database_authenticatable.rb#L18 — Drew, Oct 18 '17 at 15:56
Must be something to that effect, but wouldn't the fail method have to be redefined somewhere to use a mapping scheme? Maybe they have their own gem at play... — Drew, Oct 18 '17 at 15:57
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/157016/discussion-between-drew-and-hoffm). — Drew, Oct 18 '17 at 15:58

score 0 · Accepted Answer · answered Oct 19 '17 at 16:03

0

Looks like the fail method being used was the warden method:

http://www.rubydoc.info/github/hassox/warden/Warden%2FStrategies%2FBase:fail

answered Oct 19 '17 at 16:03

Drew

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Symbol is passed to 'raise'

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