Configure form_with_generates_remote_forms in its own initializer

This configuration is not present in ActionView::Base so we can't let
the action_view.set_configs initializer set it.

Also add tests to make sure this config works.

Fixes #28824

1 files changed, 32 insertions, 0 deletions

diff --git a/railties/test/application/configuration_test.rb b/railties/test/application/configuration_test.rb
index 14433fbba0..32eab74190 100644
--- a/railties/test/application/configuration_test.rb
+++ b/railties/test/application/configuration_test.rb
@@ -693,6 +693,38 @@ module ApplicationTests
       assert_match(/label/, last_response.body)
     end
 
+    test "form_with can be configured with form_with_generates_remote_forms" do
+      app_file "config/initializers/form_builder.rb", <<-RUBY
+      Rails.configuration.action_view.form_with_generates_remote_forms = false
+      RUBY
+
+      app_file "app/models/post.rb", <<-RUBY
+      class Post
+        include ActiveModel::Model
+        attr_accessor :name
+      end
+      RUBY
+
+      app_file "app/controllers/posts_controller.rb", <<-RUBY
+      class PostsController < ApplicationController
+        def index
+          render inline: "<%= begin; form_with(model: Post.new) {|f| f.text_field(:name)}; rescue => e; e.to_s; end %>"
+        end
+      end
+      RUBY
+
+      add_to_config <<-RUBY
+        routes.prepend do
+          resources :posts
+        end
+      RUBY
+
+      app "development"
+
+      get "/posts"
+      assert_no_match(/data-remote/, last_response.body)
+    end
+
     test "default method for update can be changed" do
       app_file "app/models/post.rb", <<-RUBY
       class Post