Validate message

app/controllers/confirmations_controller.rb

 class ConfirmationsController < Devise::ConfirmationsController
   def update_confirm
-    @user = User.find(params[:user][:id])
+    @user = User.find_by(params[:user][:id])
+    @user.skip_password_validation = false
+    @user.skip_fullname_validation = false
     if @user.update_attributes(user_params)
       set_flash_message!(:notice, :confirmed)
       redirect_to root_path

app/controllers/registrations_controller.rb

 class RegistrationsController < Devise::RegistrationsController
+  # POST /resource
+  def create
+    build_resource(sign_up_params)
+    resource.skip_password_validation = true
+    resource.skip_fullname_validation = true
+
+    resource.save
+    yield resource if block_given?
+    if resource.persisted?
+      if resource.active_for_authentication?
+        set_flash_message! :notice, :signed_up
+        sign_up(resource_name, resource)
+        respond_with resource, location: after_sign_up_path_for(resource)
+      else
+        set_flash_message! :notice, :"signed_up_but_#{resource.inactive_message}"
+        expire_data_after_sign_in!
+        respond_with resource, location: after_inactive_sign_up_path_for(resource)
+      end
+    else
+      clean_up_passwords resource
+      set_minimum_password_length
+      respond_with resource
+    end
+  end
 
   protected
 

app/models/user.rb

 class User < ApplicationRecord
+  attr_accessor :skip_password_validation, :skip_fullname_validation
   # Include default devise modules. Others available are:
   # :confirmable, :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,
@@ -6,4 +7,6 @@ class User < ApplicationRecord
          :confirmable, :lockable
   VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
   validates :email, length: { maximum: 255 }, format: { with: VALID_EMAIL_REGEX }
+  validates_presence_of :fullname, message: "can't be empty", unless: :skip_fullname_validation
+  validates_presence_of :password, message: "can't be empty", unless: :skip_fullname_validation
 end

app/views/devise/confirmations/information.html.erb

@@ -12,7 +12,7 @@
     </div>
 
     <div class="form-group">
-      <%= f.label :fullname %>
+      <%= f.label :fullname, 'Full name' %>
       <%= f.text_field :fullname, autofocus: true, class: 'form-control' %>
     </div>
 

config/locales/en.yml

@@ -30,4 +30,7 @@
 # available at http://guides.rubyonrails.org/i18n.html.
 
 en:
-  hello: "Hello world"
+  activerecord:
+    attributes:
+      user:
+        fullname: "Full Name"