Register complete

app/controllers/confirmations_controller.rb

 class ConfirmationsController < Devise::ConfirmationsController
   def update_confirm
     @user = User.find(params[:user][:id])
-    if @user.save
+    if @user.update_attributes(user_params)
       set_flash_message!(:notice, :confirmed)
       redirect_to root_path
     else
-      respond_with_navigational(resource.errors, status: :unprocessable_entity){ render :new }
+      render 'devise/confirmations/information', resource: @user
     end
   end
 
@@ -30,6 +30,6 @@ class ConfirmationsController < Devise::ConfirmationsController
 
   private
   def user_params
-    params.requires(:user).permit(:email, :fullname, :password, :cd_name)
+    params.require(:user).permit(:email, :fullname, :password, :cd_name)
   end
 end

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

@@ -7,7 +7,7 @@
 
     <div class="form-group">
       <%= f.label :email %>
-      <%= f.email_field :email, autofocus: true, class: 'form-control' %>
+      <%= f.email_field :email, autofocus: true, readonly: true, class: 'form-control' %>
       <%= f.hidden_field :id %>
     </div>