Devise, OmniAuth & Facebook: “Not found. Authentication passthru.”

Question

Trying to follow along with https://github.com/plataformatec/devise/wiki/OmniAuth:-Overview and I\'m stumped.

I\'ve got config.omniauth :facebook, ENV[\'FB_AP

Answer 1

For anyone who wants to know how to fix this, simply declare a passthru method, or do what I did, which is use action_missing (not method_missing, it is deprecated in Rails 4!) to catch all users/auth/:provider urls that omniauth uses in one method.

For instance,

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController

  def action_missing(provider)
    # Set up authentication/authorizations here, and distribute tasks
    # that are provider specific to other methods, leaving only tasks
    # that work across all providers in this method. 
  end

I hope that helps anyone else who gets stuck here, I sure did.