Saved address to address book only if user ask to save it

app/controllers/spree/checkout_controller_decorator.rb

@@ -39,11 +39,11 @@ def normalize_addresses
       if @order.bill_address_id != @order.ship_address_id && bill_address.same_as?(ship_address)
         @order.update_column(:bill_address_id, ship_address.id)
         bill_address.destroy
-      else
+      elsif params[:save_user_address]
         bill_address.update_attribute(:user_id, spree_current_user.try(:id))
       end
 
-      ship_address.update_attribute(:user_id, spree_current_user.try(:id))
+      ship_address.update_attribute(:user_id, spree_current_user.try(:id)) if params[:save_user_address]
     end
   end
 end

app/views/spree/checkout/_address.html.erb

@@ -44,6 +44,13 @@
       </div>
     </div>
   <% end %>
+
+  <p class="field checkbox"  data-hook="save_user_address">
+    <%= label_tag :save_user_address, :id => 'save_user_address' do %>
+      <%= check_box_tag 'save_user_address', '1' %>
+      <%= Spree.t(:save_user_address) %>
+    <% end %>
+  </p>
 </div>
 
 <div class="well text-right form-buttons" data-hook="buttons">

spec/features/checkout_address_selection_spec.rb

@@ -79,6 +79,7 @@
           choose I18n.t('address_book.other_address')
           fill_in_address(shipping, :ship)
         end
+        check 'save_user_address'
         complete_checkout
       end.to change { user.addresses.count }.by(2)
     end
@@ -94,6 +95,7 @@
           choose I18n.t('address_book.other_address')
           fill_in_address(billing, :ship)
         end
+        check 'save_user_address'
         complete_checkout
       end.to change { user.addresses.count }.by(1)
     end
@@ -164,6 +166,7 @@
             choose I18n.t('address_book.other_address')
             fill_in_address(shipping, :ship)
           end
+          check 'save_user_address'
           complete_checkout
         end.to change{ user.addresses.count }.by(1)
       end
@@ -247,6 +250,7 @@
             choose I18n.t('address_book.other_address')
             fill_in_address(billing)
           end
+          check 'save_user_address'
           complete_checkout
         end.to change{ user.addresses.count }.by(1)
       end