Rails 6.1.7 -> 7.0.4 にあげてみました
ただし、ほぼ api mode で使っていたものです
Ruby は 3.1.2 を使っています
Rails アップグレードガイド - Rails ガイド をよく読みます
Gemfile の rails を 7.0.4 にして bundle update rails をします
そのあと
# bin/rails app:update
conflict config/boot.rb
Overwrite /app/config/boot.rb? (enter "h" for help) [Ynaqdhm] d
- ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+ ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../Gemfile", __dir__)
- require 'bundler/setup' # Set up gems listed in the Gemfile.
+ require "bundler/setup" # Set up gems listed in the Gemfile.
- require 'bootsnap/setup' # Speed up boot time by caching expensive operations.
+ require "bootsnap/setup" # Speed up boot time by caching expensive operations.
Retrying...
Overwrite /app/config/boot.rb? (enter "h" for help) [Ynaqdhm] a
force config/boot.rb
exist config
conflict config/application.rb
force config/application.rb
conflict config/environment.rb
force config/environment.rb
exist config/environments
conflict config/environments/development.rb
force config/environments/development.rb
conflict config/environments/production.rb
force config/environments/production.rb
conflict config/environments/test.rb
force config/environments/test.rb
exist config/initializers
create config/initializers/assets.rb
create config/initializers/content_security_policy.rb
conflict config/initializers/cors.rb
force config/initializers/cors.rb
conflict config/initializers/filter_parameter_logging.rb
force config/initializers/filter_parameter_logging.rb
conflict config/initializers/inflections.rb
force config/initializers/inflections.rb
create config/initializers/new_framework_defaults_7_0.rb
create config/initializers/permissions_policy.rb
File unchanged! The supplied flag value not found! config/application.rb
exist bin
conflict bin/rails
force bin/rails
conflict bin/rake
force bin/rake
conflict bin/setup
force bin/setup
gsub db/schema.rb
rails active_storage:update
Copied migration 20221201065026_remove_not_null_on_active_storage_blobs_checksum.active_storage.rb from active_storage
After this, check Rails upgrade guide at https://guides.rubyonrails.org/upgrading_ruby_on_rails.html for more details about upgrading your app.設定が一新されるので、差分を見ながら取り込んでいきます
config/initializers/new_framework_defaults_7_0.rb は読んで不要だったら消します
config/application.rb で config.load_defaults 7.0 に変えます
できたら
bundle exec rubocop -a
bin/rpecしてエラーを潰していきます
bullet のエラーがでたので直したのがほとんどです
念のため development mode、production mode で動作確認してみて終わりです