« 25 Days of Ruby Gems - Ruby Advent Calendar 2020, December 1st - December 25th

Day 17 - any_login Gem - Speed Up Testing Allowing One-Click Turbologins® Without Passwords as Any User in the System. Switching User (Accounts) Made Easy (and Faster)

Written by igorkasyanchuk Igor Kasyanchuk

A web and mobile developer from the Ukraine at Rails Jazz. Maintains among other gems rails_db, log_analyzer, active_storage_validations.

What’s any_login?

The any_login gem is a favorite of our quality assurance (QA) team and I can’t imagine any project without it.

any_login lets you quickly switch users (with one-click Turbologins® without passwords) and log in as any user in your app (in development mode).


If you’re using Devise (or other supported pre-configured auth libraries incl. Authlogic, Clearance or Sorcery that work out-of-the-box), for example, you can add the any_login gem, add the any_login_here helper to your page layout and you’re up and running.

Step 1: Add any_login to your Gemfile

gem 'any_login'

and run in your console:

$ bundle install

Step 2: Add the any_login_here helper to your Layout

In your application layout, for example app/views/layouts/application.html.erb, add the following snippet in the bottom of the page:

<%= any_login_here   if defined?(AnyLogin) %>

That’s it.

Open up your app in the browser and on the bottom left corner, you will see the semi-transparent one-click Turbologins® user icon. Click on it and now you can select any user to log in without a password.


If you want to customize any_login run in your console:

$ rails g any_login initializer

It will create the initializer file config/initializers/any_login.rb that lets you use a variety of customization options. Below you can see an example of a configuration file (config/initializers/any_login.rb):

if defined?(AnyLogin)
  AnyLogin.setup do |config|
    # # provider (:devise, :authlogic, sorcery, clearance).
    # #   Provider can be identified automatically based on your Gemfile
    # config.provider = nil

    # # enabled or not
    # config.enabled = Rails.env.to_s == 'development'
    config.enabled = Rails.env.development?

    # # Account, User, Person, etc
    # config.klass_name = 'User'

    #  # .all, .active, .admins, .groped_collection, etc ...
    #  #   need to return an array (or hash with arrays) of users
    config.collection_method = :any_login_by_role

    # # to format user name in dropdown list
    config.name_method = proc { |e| [
        (e.client? ?
        "#{e.email} -- #{e.subscription_plan.try(:en_name)}"
        " -- photos: #{e.own_photos.count} -- #{e.full_name}" :
        "#{e.email} -- #{e.full_name}"),
        e.id] }

    # # after logging in redirect user to path
    # config.redirect_path_after_login = :root_path

    # # login on select change event OR click on button, or BOTH
    # config.login_on = :both

    # # position of any_login box top_left, top_right, bottom_left, bottom_right
    # config.position = :bottom_left

    # # label on Login button
    # config.login_button_label = 'Login'

    # # prompt message in select
    # config.select_prompt = "Select #{AnyLogin.klass_name}"

    # # show any_login box by default
    # config.auto_show = false

    # # limit, integer or :none
    # config.limit = 10

    # # Enable http basic authentication
    # config.http_basic_authentication_enabled = false

    # # Enable http basic authentication
    # config.http_basic_authentication_user_name = 'any_login'

    # # Enable http basic authentication
    # config.http_basic_authentication_password = 'password'

    # # Use controller proc condition
    # config.verify_access_proc = proc { |controller| true }

Tip: If you want to completely disable the any_login gem in production add the following code in your config/environments/production.rb file.

AnyLogin.setup do |config|
  config.enabled = false

Happy user (account) switching with one-click Turbologins® without passwords!

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