title: if @user.persisted? with Facebook omniauth | Devise
body: <p>My <strong>Omniauth_callbacks_controller.rb</strong></p>
  
  <pre><code>class Users::OmniauthCallbacksController &lt; Devise::OmniauthCallbacksController
      def facebook
          # You need to implement the method below in your model (e.g. app/models/user.rb)
          @user ||=
              User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user)
  
          if @user.persisted?
              # This will throw if @user is not activated
              sign_in_and_redirect @user, event: :authentication
              if is_navigational_format?
                  set_flash_message(:notice, :success, kind: "Facebook")
              end
          else
              session["devise.facebook_data"] = request.env["omniauth.auth"]
              redirect_to new_user_registration_url
          end
      end
  end
  </code></pre>
  
  <p>No problems, no Logs. BUT when someone tries to Connect via Facebook it throws them simply to the default Registration Form.</p>
  
  <pre><code>http://localhost:3000/sign_up#_=_
  </code></pre>
  
  <p>My User Model</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
  
    devise :database_authenticatable, :registerable, #:recoverable
           :rememberable, :trackable, :validatable, :omniauthable,
                   :omniauth_providers =&gt; [:facebook]
  
  
      # Facebook Settings
      def self.find_for_facebook_oauth(auth, signed_in_resource = nil)
          user = User.where(provider: auth.provider, uid: auth.uid).first
          if user.present?
              user
          else
              user = User.create(first_name:auth.extra.raw_info.first_name,
                                                   last_name:auth.extra.raw_info.last_name,
                                                   facebook_link:auth.extra.raw_info.link,
                                                   provider:auth.provider,
                                                   uid:auth.uid,
                                                   email:auth.info.email,
                                                   password:Devise.friendly_token[0,20])
          end
      end
  
  
  
      validates :first_name, :presence =&gt; true
      validates :email, :presence =&gt; true
      validates :user_name, :presence =&gt; true, :uniqueness =&gt; true
  
      has_many :clips
      has_one :show, dependent: :destroy
  
      # Profile Page Avatar
      has_attached_file :avatar, styles: { avatar: "64x64#"},
                                          :default_url =&gt; "http://placehold.it/150x150&amp;text=Missing"
  
      validates_attachment :avatar,
                                               content_type: { content_type: ['image/jpeg', 'image/jpg', 'image/png', 'image/gif'] },
                                               size: { less_than: 5.megabytes }
  
      # Profile Page Cover
      has_attached_file :profile_cover, styles: { cover: "870x150#"},
                                          :default_url =&gt; "http://placehold.it/150x150&amp;text=Missing"
  
      validates_attachment :profile_cover,
                                               content_type: { content_type: ['image/jpeg', 'image/jpg', 'image/png', 'image/gif'] },
                                               size: { less_than: 5.megabytes }
  
  
      # For Using the username instead of ID in the Link
      def to_param
          user_name
      end
  
  end
  </code></pre>