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Ninsho is an easy flexible authentication solution when using providers

  • Is a complete MVC solution based on Rails Engines;
  • Works with most providers out there, Github, Facebook, Twitter, Linkedin

Getting started

Ninsho 0.1.0 works with rails 3.1 onwards. You can add it to your Gemfile with:

gem 'ninsho'

Then run the bundle command to install it.

After you install Ninsho and add it to your Gemfile, you need to run the generator:

rails g ninsho:install

The generator will install in initializer which describes all the Ninsho's configuration options, so we recommend you take a look at it. When you are done you are ready to start the ninsho process, first you need to generate an authentications model or so:

rails g ninsho MODEL

Before yout start generating, we are assuming you have a model to relate to, in most cases a 'User' class, just for you to be aware and that it has an email attribute.

Replace MODEL by the class name used for the app authentications, it is commonly 'Authentication'. This will create a model(if one does not exists), and add the belongs_to_ninsho method (it's commented don't worry).

Next you'll probably want to run the migrations "rake db:migrate", as the generator will create a migration file (open it modify if you need). This generator also configures your config/routes.rb file to point to the Ninsho Controller.

Stop right here!

Once you have the 'User' model and the 'Authentication' model, you just have to relate them:

> app/models/user.rb

has_many :authentications

> app/models/authentication.rb

belongs_to_ninsho :user

Controller and helpers

Ninsho will create some helpers to use inside your controllers and views.

before_filter :authenticate_user!

To check if the user is signed in


After user is signed in or signed out it will be redirected to the root_path, but you can always change this by overwriting the redirect_on_sign_in_path or redirect_on_sign_out_path

Notice if you relate the ninsho model with for example a member model, then the helpers you should use are:

before_filter :authenticate_member!

To check if the user is signed in


Configuring views

Since Ninsho is a Rails Engine it provides a simple view for handling the session, it is very basic so you might want to change them. In this case you can run the generator and it will copy all views to your app:

rails g ninsho:views


Ninsho plays good with many providers (some test would not hurt), such as github, facebook, twitter, linkedin, and to configure them you just need to add the omniauth-provider gem to your Gemfile like so:

gem 'omniauth-facebook'

And after that if you want ninsho to respond to that, you just need to add the provider in config/initializers/ninsho.rb:

config.omniauth :facebook, "APP_ID", "APP_SECRET", :scope => 'email'

Custom fields

Now you have access to the hash provided by any of the omniauth providers gem, as an instance method under:


So if you need to add an extra field to your ninsho model (commonly 'Authentication'), it's as easy as adding a before_save callback and handle the extra stuff by yourself. Don't get it?, here ir a quick example:

Let's say we want to save the nickname from the hash into our ninsho model:

i. Add the migration to the ninsho model

rails g migration add_nickname_to_MODEL nickname:string

ii. Run the migration and add the callback which should look like:

before_save :set_nickname
def set_nickname
    self.nickname =

iii. You are good to go, and any time the user changes the nickname yours will too!


You can overwrite the ninsho locale and customize the flash messages:

      signed_in: "Signed in successfully"
      signed_out: "Signed out successfully"            

Psst! Here is a live example in rails

Rails ninsho example


  • Current gem version 0.1.0
  • Add more documentation on code
  • Add aouth token for Facebook friends
  • Add more flexibility to handle authentications and save to multiple fields
  • Add handy helpers
  • Add rails live example
  • Released gem version 0.0.3
  • Released gem version 0.0.2
  • Released gem version 0.0.1



  • Add tests
  • Support for Mongoid
  • Add wiki


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Special thanks

Inspired by the plataformatec guys, and pieces of code based on you! Thanks!


MIT License. Copyright 2012-2013 IcaliaLabs.

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