Cannot load the file entity with NULL ID - Create with AI page
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3521706. -->
Reported by: [jeetmail72](https://www.drupal.org/user/3411867)
Related to !133 !99
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>The submodule <strong>ai_agents_form_integration</strong> of <strong>ai_agents</strong> module provides a CTA 'Create with AI' on the Manage Fields page of Node/Taxonomy/user.</p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>1. Click on the Create with AI CTA on the manage fields page<br>
2. Enter the prompt and click on the Generate Fields<br>
3. The page will show the error</p>
<p>The website encountered an unexpected error. Try again later.</p>
<p>AssertionError: Cannot load the "file" entity with NULL ID. in assert() (line 261 of core/lib/Drupal/Core/Entity/EntityStorageBase.php).<br>
Drupal\Core\Entity\EntityStorageBase->load() (Line: 158)<br>
Drupal\ai_agents_form_integration\Form\FieldTypeCreation->submitForm()<br>
call_user_func_array() (Line: 105)<br>
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers() (Line: 43)<br>
Drupal\Core\Form\FormSubmitter->doSubmitForm() (Line: 589)<br>
Drupal\Core\Form\FormBuilder->processForm() (Line: 144)<br>
Drupal\autosave_form\Form\AutosaveFormBuilder->processForm() (Line: 321)<br>
Drupal\Core\Form\FormBuilder->buildForm() (Line: 97)<br>
Drupal\autosave_form\Form\AutosaveFormBuilder->buildForm() (Line: 73)<br>
Drupal\Core\Controller\FormController->getContentResult()<br>
call_user_func_array() (Line: 123)<br>
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 593)<br>
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)<br>
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)<br>
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183)<br>
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)<br>
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)<br>
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)<br>
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)<br>
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)<br>
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 116)<br>
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 90)<br>
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)<br>
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)<br>
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)<br>
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)<br>
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 709)<br>
Drupal\Core\DrupalKernel->handle() (Line: 19)</p>
<p>4. The upload document is showing an error on the file upload<br>
Drupal\Component\Plugin\Exception\PluginNotFoundException: The "file_validate_extensions" plugin does not exist.</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<p>1. Check if the file is uploaded and fetch the file contents<br>
2. Add the proper validation for the uploaded file<br>
3. Fix the route name in the Batch finish() when redirecting</p>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<p>N/A</p>
<h3 id="summary-ui-changes">User interface changes</h3>
<p>No</p>
<h3 id="summary-api-changes">API changes</h3>
<p>No</p>
<h3 id="summary-data-model-changes">Data model changes</h3>
<p>No</p>
issue