Only add ActiveRecord configuration if it is present

railties/lib/rails/generators/rails/app/templates/config/application.rb

@@ -59,7 +59,7 @@ class Application < Rails::Application
     # Specifies wether or not has_many or has_one association option :dependent => :restrict raises
     # an exception. If set to true, then an ActiveRecord::DeleteRestrictionError exception would be
     # raised. If set to false, then an error will be added on the model instead.
-    config.active_record.dependent_restrict_raises = false
+    <%= comment_if :skip_active_record %>config.active_record.dependent_restrict_raises = false
 
 <% unless options.skip_sprockets? -%>
     # Enable the asset pipeline.

railties/test/generators/app_generator_test.rb

@@ -202,6 +202,7 @@ def test_generator_if_skip_active_record_is_given
     run_generator [destination_root, "--skip-active-record"]
     assert_no_file "config/database.yml"
     assert_file "config/application.rb", /#\s+require\s+["']active_record\/railtie["']/
+    assert_file "config/application.rb", /#\s+config\.active_record\.dependent_restrict_raises = false/
     assert_file "test/test_helper.rb" do |helper_content|
       assert_no_match(/fixtures :all/, helper_content)
     end