Contrib.social

Fix warning on Diff General Settings form: Undefined array key "visual_default_view_mode"

Open on Drupal.org →
Created on 11 August 2025, 5 days ago

Problem/Motivation

Steps to reproduce

Given I am logged in with the “webmaster” user
When I navigate to "/admin/config/content/diff/general"
Then I see 

Error message
Warning: Undefined array key "visual_default_view_mode" in Drupal\diff\Form\GeneralSettingsForm->buildForm() (line 188 of modules/contrib/diff/src/Form/GeneralSettingsForm.php).
Drupal\diff\Form\GeneralSettingsForm->buildForm()
call_user_func_array() (Line: 528)
Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 279)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 97)
Drupal\autosave_form\Form\AutosaveFormBuilder->buildForm() (Line: 73)
Drupal\Core\Controller\FormController->getContentResult()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 622)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 54)
Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 53)
Asm89\Stack\Cors->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 715)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Proposed resolution

  • Change the default config for diff.settings to follow with the new schema config.

Remaining tasks

  • ✅ File an issue about this project
  • ❌ Addition/Change/Update/Fix to this project
  • ❌ Testing to ensure no regression
  • ➖ Automated unit/functional testing coverage
  • ➖ Developer Documentation support on feature change/addition
  • ➖ User Guide Documentation support on feature change/addition
  • ➖ UX/UI designer responsibilities
  • ➖ Accessibility and Readability
  • ❌ Code review from 1 Varbase core team member
  • ❌ Full testing and approval
  • ❌ Credit contributors
  • ❌ Review with the product owner
  • ❌ Update Release Notes and Update Helper on new feature change/addition
  • ❌ Release

Varbase update type

  • ✅ No Update
  • ➖ Optional Update
  • ➖ Forced Update
  • ➖ Forced Update if Unchanged

User interface changes

  • N/A

API changes

  • N/A

Data model changes

  • N/A

Release notes snippet

  • N/A
📌 Task
Status

Active

Version

10.1

Component

Code

Created by

🇯🇴Jordan Rajab Natshah Jordan

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