Upgrade Rails 8.0 (#1434)

- Removed `second_level_cache`.
- Add more test to admin controllers.
- Remove # frozen_string_literal: true it default enabled in Ruby 3.4.
- Use rubocop-rails-omakase

.rubocop.yml

@@ -0,0 +1,10 @@
+AllCops:
+  Exclude:
+    - lib/templates/**/*
+# Omakase Ruby styling for Rails
+inherit_gem: { rubocop-rails-omakase: rubocop.yml }
+# Overwrite or add rules to create your own house style
+#
+# # Use `[a, [b, c]]` not `[ a, [ b, c ] ]`
+Layout/SpaceInsideArrayLiteralBrackets:
+  Enabled: false

.vscode/settings.json

@@ -42,10 +42,5 @@
   "i18n-ally.sourceLanguage": "zh-CN",
   "i18n-ally.translate.engines": ["opencc", "google"],
   "prettier.singleQuote": false,
-  "ruby.format": "standard",
-  "ruby.lint": {
-    "standard": {
-      "useBundler": true
-    }
-  }
+  "ruby.format": "rubocop"
 }

Gemfile

@@ -1,11 +1,9 @@
-# frozen_string_literal: true
-
 source "https://rubygems.org"
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}.git" }
 
 gem "jbuilder"
-gem "rails", "~> 7.1.3"
+gem "rails", "~> 8.0.0.beta1"
 gem "rails_autolink"
 gem "sass-rails"
 gem "shakapacker", "~> 7.2.1"
@@ -65,7 +63,6 @@ gem "pghero"
 # Cache
 gem "connection_pool"
 gem "redis"
-gem "second_level_cache"
 
 # Setting
 gem "rails-settings-cached"
@@ -109,5 +106,5 @@ group :development, :test do
   gem "minitest-spec-rails"
   gem "mocha"
 
-  gem "standard"
+  gem "rubocop-rails-omakase", require: false
 end