Upgrade Rails 5.2 -> 6.0

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'rails', '~> 5.2.0'
+gem 'rails', '~> 6.0.0'
 gem 'bootsnap'
 gem 'coffee-script'
 gem 'jbuilder'

Gemfile.lock

@@ -1,51 +1,64 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.4.5)
-      actionpack (= 5.2.4.5)
+    actioncable (6.0.3.5)
+      actionpack (= 6.0.3.5)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      actionview (= 5.2.4.5)
-      activejob (= 5.2.4.5)
+    actionmailbox (6.0.3.5)
+      actionpack (= 6.0.3.5)
+      activejob (= 6.0.3.5)
+      activerecord (= 6.0.3.5)
+      activestorage (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
+      mail (>= 2.7.1)
+    actionmailer (6.0.3.5)
+      actionpack (= 6.0.3.5)
+      actionview (= 6.0.3.5)
+      activejob (= 6.0.3.5)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.4.5)
-      actionview (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
+    actionpack (6.0.3.5)
+      actionview (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
       rack (~> 2.0, >= 2.0.8)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.4.5)
-      activesupport (= 5.2.4.5)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.0.3.5)
+      actionpack (= 6.0.3.5)
+      activerecord (= 6.0.3.5)
+      activestorage (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
+      nokogiri (>= 1.8.5)
+    actionview (6.0.3.5)
+      activesupport (= 6.0.3.5)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.4.5)
-      activesupport (= 5.2.4.5)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.0.3.5)
+      activesupport (= 6.0.3.5)
       globalid (>= 0.3.6)
-    activemodel (5.2.4.5)
-      activesupport (= 5.2.4.5)
-    activerecord (5.2.4.5)
-      activemodel (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
-      arel (>= 9.0)
-    activerecord-sqlserver-adapter (5.2.1)
-      activerecord (~> 5.2.0)
+    activemodel (6.0.3.5)
+      activesupport (= 6.0.3.5)
+    activerecord (6.0.3.5)
+      activemodel (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
+    activerecord-sqlserver-adapter (6.0.1)
+      activerecord (~> 6.0.0)
       tiny_tds
-    activestorage (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      activerecord (= 5.2.4.5)
+    activestorage (6.0.3.5)
+      actionpack (= 6.0.3.5)
+      activejob (= 6.0.3.5)
+      activerecord (= 6.0.3.5)
       marcel (~> 0.3.1)
-    activesupport (5.2.4.5)
+    activesupport (6.0.3.5)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
-    arel (9.0.0)
+      zeitwerk (~> 2.2, >= 2.2.2)
     better_errors (2.9.1)
       coderay (>= 1.0.0)
       erubi (>= 1.0.0)
@@ -99,30 +112,32 @@ GEM
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    rails (5.2.4.5)
-      actioncable (= 5.2.4.5)
-      actionmailer (= 5.2.4.5)
-      actionpack (= 5.2.4.5)
-      actionview (= 5.2.4.5)
-      activejob (= 5.2.4.5)
-      activemodel (= 5.2.4.5)
-      activerecord (= 5.2.4.5)
-      activestorage (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
+    rails (6.0.3.5)
+      actioncable (= 6.0.3.5)
+      actionmailbox (= 6.0.3.5)
+      actionmailer (= 6.0.3.5)
+      actionpack (= 6.0.3.5)
+      actiontext (= 6.0.3.5)
+      actionview (= 6.0.3.5)
+      activejob (= 6.0.3.5)
+      activemodel (= 6.0.3.5)
+      activerecord (= 6.0.3.5)
+      activestorage (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
       bundler (>= 1.3.0)
-      railties (= 5.2.4.5)
+      railties (= 6.0.3.5)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
     rails-html-sanitizer (1.3.0)
       loofah (~> 2.3)
-    railties (5.2.4.5)
-      actionpack (= 5.2.4.5)
-      activesupport (= 5.2.4.5)
+    railties (6.0.3.5)
+      actionpack (= 6.0.3.5)
+      activesupport (= 6.0.3.5)
       method_source
       rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
+      thor (>= 0.20.3, < 2.0)
     rake (13.0.3)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
@@ -156,14 +171,15 @@ GEM
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    web-console (3.7.0)
-      actionview (>= 5.0)
-      activemodel (>= 5.0)
+    web-console (4.1.0)
+      actionview (>= 6.0.0)
+      activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
-      railties (>= 5.0)
+      railties (>= 6.0.0)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
+    zeitwerk (2.4.2)
 
 PLATFORMS
   ruby
@@ -177,7 +193,7 @@ DEPENDENCIES
   jbuilder
   jquery-rails
   listen
-  rails (~> 5.2.0)
+  rails (~> 6.0.0)
   sass-rails
   spring
   spring-watcher-listen

bin/setup

@@ -1,6 +1,5 @@
 #!/usr/bin/env ruby
 require 'fileutils'
-include FileUtils
 
 # path to your application root.
 APP_ROOT = File.expand_path('..', __dir__)
@@ -9,24 +8,25 @@ def system!(*args)
   system(*args) || abort("\n== Command #{args} failed ==")
 end
 
-chdir APP_ROOT do
-  # This script is a starting point to setup your application.
+FileUtils.chdir APP_ROOT do
+  # This script is a way to setup or update your development environment automatically.
+  # This script is idempotent, so that you can run it at anytime and get an expectable outcome.
   # Add necessary setup steps to this file.
 
   puts '== Installing dependencies =='
   system! 'gem install bundler --conservative'
   system('bundle check') || system!('bundle install')
 
-  # Install JavaScript dependencies if using Yarn
+  # Install JavaScript dependencies
   # system('bin/yarn')
 
   # puts "\n== Copying sample files =="
   # unless File.exist?('config/database.yml')
-  #   cp 'config/database.yml.sample', 'config/database.yml'
+  #   FileUtils.cp 'config/database.yml.sample', 'config/database.yml'
   # end
 
   puts "\n== Preparing database =="
-  system! 'bin/rails db:setup'
+  system! 'bin/rails db:prepare'
 
   puts "\n== Removing old logs and tempfiles =="
   system! 'bin/rails log:clear tmp:clear'

config/application.rb

@@ -9,7 +9,7 @@
 module SsApp
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 5.2
+    config.load_defaults 6.0
 
     # Settings in config/environments/* take precedence over those specified here.
     # Application configuration can go into files in config/initializers

config/cable.yml

@@ -2,7 +2,7 @@ development:
   adapter: async
 
 test:
-  adapter: async
+  adapter: test
 
 production:
   adapter: redis

config/environments/development.rb

@@ -16,6 +16,7 @@
   # Run rails dev:cache to toggle caching.
   if Rails.root.join('tmp', 'caching-dev.txt').exist?
     config.action_controller.perform_caching = true
+    config.action_controller.enable_fragment_cache_logging = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
@@ -27,7 +28,7 @@
     config.cache_store = :null_store
   end
 
-  # Store uploaded files on the local file system (see config/storage.yml for options)
+  # Store uploaded files on the local file system (see config/storage.yml for options).
   config.active_storage.service = :local
 
   # Don't care if the mailer can't send.
@@ -52,7 +53,7 @@
   # Suppress logger output for asset requests.
   config.assets.quiet = true
 
-  # Raises error for missing translations
+  # Raises error for missing translations.
   # config.action_view.raise_on_missing_translations = true
 
   # Use an evented file watcher to asynchronously detect changes in source code,

config/environments/production.rb

@@ -22,26 +22,23 @@
   # Apache or NGINX already handles this.
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
-  # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  # Compress CSS using a preprocessor.
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false
 
-  # `config.assets.precompile` and `config.assets.version` have moved to config/initializers/assets.rb
-
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = 'http://assets.example.com'
 
   # Specifies the header that your server uses for sending files.
   # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
   # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
 
-  # Store uploaded files on the local file system (see config/storage.yml for options)
+  # Store uploaded files on the local file system (see config/storage.yml for options).
   config.active_storage.service = :local
 
-  # Mount Action Cable outside main process or domain
+  # Mount Action Cable outside main process or domain.
   # config.action_cable.mount_path = nil
   # config.action_cable.url = 'wss://example.com/cable'
   # config.action_cable.allowed_request_origins = [ 'http://example.com', /http:\/\/example.*/ ]
@@ -59,9 +56,9 @@
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
 
-  # Use a real queuing backend for Active Job (and separate queues per environment)
+  # Use a real queuing backend for Active Job (and separate queues per environment).
   # config.active_job.queue_adapter     = :resque
-  # config.active_job.queue_name_prefix = "ss_app_#{Rails.env}"
+  # config.active_job.queue_name_prefix = "ss_app_production"
 
   config.action_mailer.perform_caching = false
 
@@ -91,4 +88,25 @@
 
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  # Inserts middleware to perform automatic connection switching.
+  # The `database_selector` hash is used to pass options to the DatabaseSelector
+  # middleware. The `delay` is used to determine how long to wait after a write
+  # to send a subsequent read to the primary.
+  #
+  # The `database_resolver` class is used by the middleware to determine which
+  # database is appropriate to use based on the time delay.
+  #
+  # The `database_resolver_context` class is used by the middleware to set
+  # timestamps for the last write to the primary. The resolver uses the context
+  # class timestamps to determine how long to wait before reading from the
+  # replica.
+  #
+  # By default Rails will store a last write timestamp in the session. The
+  # DatabaseSelector middleware is designed as such you can define your own
+  # strategy for connection switching and pass that into the middleware through
+  # these configuration options.
+  # config.active_record.database_selector = { delay: 2.seconds }
+  # config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
+  # config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
 end

config/environments/test.rb

@@ -1,11 +1,13 @@
+# The test environment is used exclusively to run your application's
+# test suite. You never need to work with it otherwise. Remember that
+# your test database is "scratch space" for the test suite and is wiped
+# and recreated between test runs. Don't rely on the data there!
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  # The test environment is used exclusively to run your application's
-  # test suite. You never need to work with it otherwise. Remember that
-  # your test database is "scratch space" for the test suite and is wiped
-  # and recreated between test runs. Don't rely on the data there!
-  config.cache_classes = true
+  config.cache_classes = false
+  config.action_view.cache_template_loading = true
 
   # Do not eager load code on boot. This avoids loading your whole application
   # just for the purpose of running a single test. If you are using a tool that
@@ -21,14 +23,15 @@
   # Show full error reports and disable caching.
   config.consider_all_requests_local       = true
   config.action_controller.perform_caching = false
+  config.cache_store = :null_store
 
   # Raise exceptions instead of rendering exception templates.
   config.action_dispatch.show_exceptions = false
 
   # Disable request forgery protection in test environment.
   config.action_controller.allow_forgery_protection = false
 
-  # Store uploaded files on the local file system in a temporary directory
+  # Store uploaded files on the local file system in a temporary directory.
   config.active_storage.service = :test
 
   config.action_mailer.perform_caching = false
@@ -41,6 +44,6 @@
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr
 
-  # Raises error for missing translations
+  # Raises error for missing translations.
   # config.action_view.raise_on_missing_translations = true
 end

config/initializers/content_security_policy.rb

@@ -11,6 +11,8 @@
 #   policy.object_src  :none
 #   policy.script_src  :self, :https
 #   policy.style_src   :self, :https
+#   # If you are using webpack-dev-server then specify webpack-dev-server host
+#   policy.connect_src :self, :https, "http://localhost:3035", "ws://localhost:3035" if Rails.env.development?
 
 #   # Specify URI for violation reports
 #   # policy.report_uri "/csp-violation-report-endpoint"
@@ -19,6 +21,9 @@
 # If you are using UJS then enable automatic nonce generation
 # Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
 
+# Set the nonce only to specific directives
+# Rails.application.config.content_security_policy_nonce_directives = %w(script-src)
+
 # Report CSP violations to a specified URI
 # For further information see the following documentation:
 # https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy-Report-Only

config/locales/en.yml

@@ -27,7 +27,7 @@
 #   'true': 'foo'
 #
 # To learn more, please read the Rails Internationalization guide
-# available at http://guides.rubyonrails.org/i18n.html.
+# available at https://guides.rubyonrails.org/i18n.html.
 
 en:
   hello: "Hello world"