Upgrading Spree 4.0 to 4.1

This guide covers upgrading a 4.0 Spree application to Spree 4.1.

If you have any questions or suggestions feel free to reach out through Spree slack channels

If you’re on an older version than 4.0 please follow previous upgrade guides and perform those upgrades incrementally, eg.

This is the safest and recommended method.

Update Gemfile

gem 'spree', '~> 4.1'
gem 'spree_gateway', '~> 3.9'

rails spree:install:migrations

rails db:migrate

Now you have two options:

Spree 4.1 comes with a completely new mobile-first ultra-fast Storefront powered by Turbolinks.

To replace your current frontend with the new Spree UI follow these steps:

Update Spree Auth Devise to 4.1 in your Gemfile
```
gem 'spree_auth_devise', '~> 4.1'
```
In your project root directory run:
```
rails g spree:frontend:copy_storefront
```
WARNING this will overwrite your current project templates, it’s required for the new UI, so if you’ll be asked by the generator what to do please choose A to proceed
Next, you will need to copy over two files:
- spree_storefront.rb to config/initializers/spree_storefront.rb
- spree_storefront.yml to config/spree_storefront.yml
If you overwrote any spree_frontend controllers you will need to either remove your local copies or move your custom logic to decorators
Same goes for helpers
You will also need to remove this line:
```
//= require spree/frontend/spree_auth
```
from vendor/assets/javascripts/spree/frontend.all.js file

If you wish to not move to the new Storefront UI it’s still an option. Just proceed with the steps described below.

Keep Spree Auth Devise at the version you’re currently using

If you’re using Spree Auth Devise gem you need to lock it at 4.0.0 in your Gemfile:
```
gem 'spree_auth_devise', '~> 4.0.0'
```
Copy over all views from Spree 4.0

Copy over views from: https://github.com/spree/spree/tree/4-0-stable/frontend/app/views to your application views directory: app/views

WARNING remember to not overwrite your custom changes!
Copy over all Stylesheets from Spree 4.0

Copy over stylesheets from: https://github.com/spree/spree/tree/4-0-stable/frontend/app/assets/stylesheets to app/stylesheets

WARNING remember to not overwrite your custom changes!
Copy over all JavaScript from Spree 4.0

Copy over stylesheets from: https://github.com/spree/spree/tree/4-0-stable/frontend/app/assets/javascripts to app/javascripts

WARNING remember to not overwrite your custom changes!

For information about changes contained within this release, please read the 4.1.0 Release Notes.

If you have any questions or suggestions feel free to reach out through Spree slack channels