Contrib.social

Variable evaluation is skipped when multiple events are processed within a single request

Open on Drupal.org →
Created on 12 July 2019, over 5 years ago
Updated 2 February 2024, 11 months ago

Problem/Motivation

When BR is processing multiple events within a single PHP request, variables are not evaluated for the consecutive calls, because they are cached by variable IDs (which will be the same for the same event type/entity type combination)

For example, running a migration will trigger entity_insert/entity_update events multiple times within the single PHP process, however with different entities as arguments. BR must evaluate variables based on the event and its data, and variable ID.

This leading to the PHP fatal errors like:

  • Call to a member function getValue() on null in \Drupal\business_rules\Plugin\BusinessRulesAction\LoopThroughViewResult->execute()
  • Call to a member function getValue() on null in \Drupal\BusinessRulesCondition\UserVariableHasRole->process()

Proposed resolution

Rewrite evaluated variables "caching" system to account for the passed event data and variable ID

Remaining tasks

Review patch

User interface changes

No

API changes

No

Data model changes

No

Original report

Using the latest 8.x-dev-version:

I need to run 5 loops at the same time during cron. I separated them in different business rules, to be able to enable and disable any of them. It runs fine as long only one loop is firing (due to a view providing 1 value).

as soon as two loops fire or one view has more than 1 result, I have the following error

Error: Call to a member function getValue() on null in Drupal\business_rules\Plugin\BusinessRulesAction\LoopThroughViewResult->execute() (line 340 of /var/aegir/platforms/--academy-002/modules/business_rules/src/Plugin/BusinessRulesAction/LoopThroughViewResult.php) #0 /var/aegir/platforms/--academy-002/modules/business_rules/src/Entity/Action.php(97): Drupal\business_rules\Plugin\BusinessRulesAction\LoopThroughViewResult->execute(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #1 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(474): Drupal\business_rules\Entity\Action->execute(Object(Drupal\business_rules\Events\BusinessRulesEvent)) #2 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(316): Drupal\business_rules\Util\BusinessRulesProcessor->executeAction(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #3 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(261): Drupal\business_rules\Util\BusinessRulesProcessor->processItems(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent), 'internal_staff_...') #4 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(168): Drupal\business_rules\Util\BusinessRulesProcessor->processTriggeredRules(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent)) #5 /var/aegir/platforms/--academy-002/modules/business_rules/src/EventSubscriber/BusinessRulesListener.php(136): Drupal\business_rules\Util\BusinessRulesProcessor->process(Object(Drupal\business_rules\Events\BusinessRulesEvent)) #6 [internal function]: Drupal\business_rules\EventSubscriber\BusinessRulesListener->process(Object(Drupal\business_rules\Events\BusinessRulesEvent), 'business_rules....', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #7 /var/aegir/platforms/--academy-002/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent), 'business_rules....', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #8 /var/aegir/platforms/--academy-002/modules/business_rules/business_rules.module(90): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('business_rules....', Object(Drupal\business_rules\Events\BusinessRulesEvent)) #9 [internal function]: business_rules_entity_update(Object(Drupal\group\Entity\Group)) #10 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Extension/ModuleHandler.php(403): call_user_func_array('business_rules_...', Array) #11 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/EntityStorageBase.php(206): Drupal\Core\Extension\ModuleHandler->invokeAll('entity_update', Array) #12 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php(773): Drupal\Core\Entity\EntityStorageBase->invokeHook('update', Object(Drupal\group\Entity\Group)) #13 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/EntityStorageBase.php(507): Drupal\Core\Entity\ContentEntityStorageBase->invokeHook('update', Object(Drupal\group\Entity\Group)) #14 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/ContentEntityStorageBase.php(658): Drupal\Core\Entity\EntityStorageBase->doPostSave(Object(Drupal\group\Entity\Group), true) #15 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/EntityStorageBase.php(432): Drupal\Core\Entity\ContentEntityStorageBase->doPostSave(Object(Drupal\group\Entity\Group), true) #16 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php(774): Drupal\Core\Entity\EntityStorageBase->save(Object(Drupal\group\Entity\Group)) #17 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Entity/Entity.php(390): Drupal\Core\Entity\Sql\SqlContentEntityStorage->save(Object(Drupal\group\Entity\Group)) #18 /var/aegir/platforms/--academy-002/modules/business_rules/src/Plugin/BusinessRulesAction/SaveEntityVariableAction.php(115): Drupal\Core\Entity\Entity->save() #19 /var/aegir/platforms/--academy-002/modules/business_rules/src/Entity/Action.php(97): Drupal\business_rules\Plugin\BusinessRulesAction\SaveEntityVariableAction->execute(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #20 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(474): Drupal\business_rules\Entity\Action->execute(Object(Drupal\business_rules\Events\BusinessRulesEvent)) #21 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(316): Drupal\business_rules\Util\BusinessRulesProcessor->executeAction(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #22 /var/aegir/platforms/--academy-002/modules/business_rules/src/Plugin/BusinessRulesAction/LoopThroughViewResult.php(349): Drupal\business_rules\Util\BusinessRulesProcessor->processItems(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent), 'loop2_elc') #23 /var/aegir/platforms/--academy-002/modules/business_rules/src/Entity/Action.php(97): Drupal\business_rules\Plugin\BusinessRulesAction\LoopThroughViewResult->execute(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #24 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(474): Drupal\business_rules\Entity\Action->execute(Object(Drupal\business_rules\Events\BusinessRulesEvent)) #25 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(316): Drupal\business_rules\Util\BusinessRulesProcessor->executeAction(Object(Drupal\business_rules\Entity\Action), Object(Drupal\business_rules\Events\BusinessRulesEvent)) #26 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(261): Drupal\business_rules\Util\BusinessRulesProcessor->processItems(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent), 'event_life_cycl...') #27 /var/aegir/platforms/--academy-002/modules/business_rules/src/Util/BusinessRulesProcessor.php(168): Drupal\business_rules\Util\BusinessRulesProcessor->processTriggeredRules(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent)) #28 /var/aegir/platforms/--academy-002/modules/business_rules/src/EventSubscriber/BusinessRulesListener.php(136): Drupal\business_rules\Util\BusinessRulesProcessor->process(Object(Drupal\business_rules\Events\BusinessRulesEvent)) #29 [internal function]: Drupal\business_rules\EventSubscriber\BusinessRulesListener->process(Object(Drupal\business_rules\Events\BusinessRulesEvent), 'business_rules....', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #30 /var/aegir/platforms/--academy-002/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(111): call_user_func(Array, Object(Drupal\business_rules\Events\BusinessRulesEvent), 'business_rules....', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #31 /var/aegir/platforms/--academy-002/modules/business_rules/business_rules.module(478): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('business_rules....', Object(Drupal\business_rules\Events\BusinessRulesEvent)) #32 [internal function]: business_rules_cron() #33 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Extension/ModuleHandler.php(392): call_user_func_array('business_rules_...', Array) #34 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Cron.php(235): Drupal\Core\Extension\ModuleHandler->invoke('business_rules', 'cron') #35 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Cron.php(133): Drupal\Core\Cron->invokeCronHandlers() #36 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/ProxyClass/Cron.php(75): Drupal\Core\Cron->run() #37 /var/aegir/platforms/--academy-002/modules/admin_toolbar/admin_toolbar_tools/src/Controller/ToolbarController.php(258): Drupal\Core\ProxyClass\Cron->run() #38 [internal function]: Drupal\admin_toolbar_tools\Controller\ToolbarController->runCron() #39 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #40 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/Render/Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #41 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #42 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #43 /var/aegir/platforms/--academy-002/vendor/symfony/http-kernel/HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #44 /var/aegir/platforms/--academy-002/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #45 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #46 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #47 /var/aegir/platforms/--academy-002/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #48 /var/aegir/platforms/--academy-002/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #49 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #50 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #51 /var/aegir/platforms/--academy-002/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #52 /var/aegir/platforms/--academy-002/core/lib/Drupal/Core/DrupalKernel.php(693): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #53 /var/aegir/platforms/--academy-002/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #54 {main}.

🐛 Bug report
Status

Fixed

Version

1.0

Component

Code

Created by

🇦🇹Austria ChrisZZ Vienna

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