foreach() argument must be of type array|object, null given
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3558587. -->
Reported by: [ttrelvik](https://www.drupal.org/user/3855700)
Related to !239 !211
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p> I was trying to set up a RAG chatbot on a small blog, and the RAG part is failing, and resulting in an ai_agents warning in my logs. </p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p> I was following along this <a href="https://youtu.be/eEG16tDwV9A?si=qyXnu4TtvdChuun8">RAG chatbot how-to</a>, only I was attempting it on a Drupal instance running drupal/cms 1.2.8 on Drupal Core 11.2.8. </p>
<p> Everything else seemed to be working, I was able to confirm the embeddings were generated and stored in the vectorDB just fine, but instead of RAG enabled responses, the chatbot appeared to be giving total hallucination responses, and while looking into that I found this ai_agents warning in my logs: </p>
<pre>Warning: foreach() argument must be of type array|object, null given in Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->allRequiredToolsRan() (line 1023 of /app/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php)<br><br>#0 /app/web/core/includes/bootstrap.inc(104): _drupal_error_handler_real(2, 'foreach() argum...', '/app/web/module...', 1023)<br>#1 /app/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(1023): _drupal_error_handler(2, 'foreach() argum...', '/app/web/module...', 1023)<br>#2 /app/web/modules/contrib/ai_agents/src/PluginBase/AiAgentEntityWrapper.php(581): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->allRequiredToolsRan()<br>#3 /app/web/modules/contrib/ai/modules/ai_assistant_api/src/Service/AgentRunner.php(88): Drupal\ai_agents\PluginBase\AiAgentEntityWrapper->determineSolvability()<br>#4 /app/web/modules/contrib/ai/modules/ai_assistant_api/src/AiAssistantApiRunner.php(316): Drupal\ai_assistant_api\Service\AgentRunner->runAsAgent('portfolio_advoc...', Array, Array, 'assistant_threa...', true)<br>#5 /app/web/modules/contrib/ai/modules/ai_chatbot/src/Controller/DeepChatApi.php(169): Drupal\ai_assistant_api\AiAssistantApiRunner->process()<br>#6 [internal function]: Drupal\ai_chatbot\Controller\DeepChatApi->api(Object(Symfony\Component\HttpFoundation\Request))<br>#7 /app/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array)<br>#8 /app/web/core/lib/Drupal/Core/Render/Renderer.php(627): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()<br>#9 /app/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(121): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))<br>#10 /app/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)<br>#11 /app/vendor/symfony/http-kernel/HttpKernel.php(183): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()<br>#12 /app/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)<br>#13 /app/web/core/lib/Drupal/Core/StackMiddleware/Session.php(53): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#14 /app/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#15 /app/web/core/lib/Drupal/Core/StackMiddleware/ContentLength.php(28): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#16 /app/web/core/modules/big_pipe/src/StackMiddleware/ContentLength.php(32): Drupal\Core\StackMiddleware\ContentLength->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#17 /app/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(116): Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#18 /app/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(90): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#19 /app/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#20 /app/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#21 /app/web/core/lib/Drupal/Core/StackMiddleware/AjaxPageState.php(53): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#22 /app/web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\AjaxPageState->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#23 /app/web/core/lib/Drupal/Core/DrupalKernel.php(715): Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)<br>#24 /app/web/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))<br>#25 {main}<br><br>.</pre><p> Asking about this in Drupal Slack <a href="https://drupal.slack.com/archives/CDL2YPBNX">#ai</a>, I was <a href="https://drupal.slack.com/archives/CDL2YPBNX/p1763150047612759?thread_ts=1763039636.209749&cid=CDL2YPBNX">encouraged to file this as an issue</a> here, so that's what I'm doing. I hope this information is useful. If there's anything else I could provide to help investigate this, feel free to let me know and I'll do my best to be helpful. </p>
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