Ruby on Rails Devise code after login

问题:

I have an RoR app using Devise for logins. There is some code that is executed when a new User record is created, by being put in the user.rb file as an after_create call/macro/whatever. I need to make this code run after each login, instead of running on new user creation.

With some Googling, it seems that one option is to place Warden callbacks in the devise.rb code. My questions are:

1. Is this right, and/or is there a better way to do this?
2. If this is the right approach ...
   • Should the Warden::Manager... method defs go in devise.rb inside of Devise.setup, or after it?
   • Is after_authentication the callback I should use? I'm just checking to see if a directory based on the user's name exists, and if not, creating it.

回答1:

Just subclass Devise's sessions controller and put your custom behaviour there:

# config/routes.rb
devise_for :users, :controllers => { :sessions => "custom_sessions" }

And then create your controller like this:

# app/controllers/custom_sessions_controller.rb
class CustomSessionsController < Devise::SessionsController
  before_filter :before_login, :only => :create
  after_filter :after_login, :only => :create

  def before_login
  end

  def after_login
  end
end

回答2:

I found that using the Devise Warden hook cleanly allowed after login event trapping by looking for the ":set_user" :event.

In user.rb:

class User < ApplicationRecord
  Warden::Manager.after_set_user do |user, auth, opts|
    if (opts[:scope] == :user && opts[:event] == :set_user)
      # < Do your after login work here >
    end
  end
end

回答3:

I think this is an duplicate question. Yes you can execute code after every successful log in. you could write the code in your ApplicationController. Also have a look at http://github.com/plataformatec/devise/wiki/How-To:-Redirect-to-a-specific-page-on-successful-sign-in. Also, check out How to redirect to a specific page on successful sign up using rails devise gem? for some ideas.

You can do something like:

def after_sign_in_path_for(resource_or_scope)
Your Code Here
end

Reference Can I execute custom actions after successful sign in with Devise?

You could also inherit from devise session's class and use after_filter for logins.