AJAX Json login implementation example?

[goodwill_at_work]

Anyone has a good implementation reference on this? I just want to
enable sessions controller to take json, so minimal customization is
preferred instead of overriding the whole thing, alternatively if I
can just in place override with a sessionscontroller instead of
creating a useless scope like users/sessions (I only have one and only
one login scope in the system which is user) would be great.

[Nick Chistyakov]

Hi William,

Some time ago asked the same question.

Got no responses so not sure that I implemented in a best canonical way.

I just reimplemented the users session controller like this:

class Users::SessionsController < Devise::SessionsController                

  

  # prepend_before_filter :require_no_authentication, :only => [:failure]          

  layout "login"                        

  # Have to reimplement :recall => "failure"

  # for warden to redirect to some action that will return what I want

  def create    

    logger.debug "Trying to create a new session..."

    resource = warden.authenticate!(:scope => resource_name, :recall => "failure")

    # set_flash_message :notice, :signed_in 

    sign_in_and_redirect(resource_name, resource)      

  end     

  

  # Mostly a copy of original source code.

  # Needed only call render :json => ... in the end

  def sign_in_and_redirect(resource_or_scope, resource=nil)

    scope      = Devise::Mapping.find_scope!(resource_or_scope)     

    resource ||= resource_or_scope

    sign_in(scope, resource) unless warden.user(scope) == resource

    render :json => { :success => true, :redirect  => stored_location_for(scope) || after_sign_in_path_for(resource) } 

  end

                                                                        

  def failure

    render :json => {:success => false, :errors => {:reason => "Login failed. Try again"}} 

  end   

  

end    

And certainly added a string in routes.rb

devise_for :users,   :controllers => { :sessions => "users/sessions" } 

Hope that it helped,

Nick