From 1a87630d54a2adc8053284f962db4070b1f0cc18 Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike@37signals.com>
Date: Mon, 27 Oct 2025 15:19:52 -0400
Subject: [PATCH 1/2] Add Rails 8.1 to the CI testing matrix

---
 .github/workflows/upstream.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/upstream.yml b/.github/workflows/upstream.yml
index 5e2440a..8d56199 100644
--- a/.github/workflows/upstream.yml
+++ b/.github/workflows/upstream.yml
@@ -41,7 +41,7 @@ jobs:
       fail-fast: false
       matrix:
         plat: ["ubuntu"]
-        ref: ["7-2-stable", "8-0-stable", "main"]
+        ref: ["7-2-stable", "8-0-stable", "8-1-stable", "main"]
     env:
       RAILSOPTS: --git=https://github.com/rails/rails --ref=${{ matrix.ref }}
     steps:

From 770b8e90668f7a3b14aebeae8fb38188bd050d15 Mon Sep 17 00:00:00 2001
From: Mike Dalessio <mike@37signals.com>
Date: Mon, 27 Oct 2025 15:40:50 -0400
Subject: [PATCH 2/2] Gracefully handle the new Rails default of "no system
 tests"

Fixes #585
---
 CHANGELOG.md                                            | 7 +++++++
 lib/generators/test_unit/scaffold/scaffold_generator.rb | 7 +++----
 test/integration/user_install_test.sh                   | 6 +++++-
 3 files changed, 15 insertions(+), 5 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index aae4aa4..917d8b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # `tailwindcss-rails` Changelog
 
+## next / unreleased
+
+### Improved
+
+* Support Rails 8.1 scaffolding which disables system tests by default. #585 @flavorjones
+
+
 ## v4.3.0 / 2025-07-06
 
 ### Improved
diff --git a/lib/generators/test_unit/scaffold/scaffold_generator.rb b/lib/generators/test_unit/scaffold/scaffold_generator.rb
index c9f1647..511ca7d 100644
--- a/lib/generators/test_unit/scaffold/scaffold_generator.rb
+++ b/lib/generators/test_unit/scaffold/scaffold_generator.rb
@@ -4,10 +4,9 @@ module TestUnit # :nodoc:
   module Generators # :nodoc:
     class ScaffoldGenerator < Base # :nodoc:
       def fix_system_test
-        if turbo_defined? && options[:system_tests]
-          gsub_file File.join("test/system", class_path, "#{file_name.pluralize}_test.rb"),
-                    /(click_on.*Destroy this.*)$/,
-                    "accept_confirm { \\1 }"
+        system_test_file = File.join("test/system", class_path, "#{file_name.pluralize}_test.rb")
+        if turbo_defined? && options[:system_tests] && File.exist?(system_test_file)
+          gsub_file(system_test_file, /(click_on.*Destroy this.*)$/, "accept_confirm { \\1 }")
         end
       end
 
diff --git a/test/integration/user_install_test.sh b/test/integration/user_install_test.sh
index c68123e..46b5056 100755
--- a/test/integration/user_install_test.sh
+++ b/test/integration/user_install_test.sh
@@ -69,8 +69,12 @@ if [[ $(rails -v) > "Rails 8.0.0.beta" ]] ; then
   grep -q PasswordsController app/controllers/passwords_controller.rb
 fi
 
+# TEST: doesn't fail when not generating system tests
+bin/rails generate scaffold memo title:string body:text published:boolean --system-tests=false
+grep -q "Show" app/views/memos/index.html.erb
+
 # TEST: presence of the generated file
-bin/rails generate scaffold post title:string body:text published:boolean
+bin/rails generate scaffold post title:string body:text published:boolean --system-tests=true
 grep -q "Show" app/views/posts/index.html.erb
 
 # TEST: the "accept_confirm" system test change was applied cleanly