XF 2.2 getPushTemplateName() on nulll


Well-known member
If you've ever created a custom content type within XenForo you may have been tempted to add reactions (or formerly Likes) to them but perhaps been concerned that it might be difficult to implement them with your custom code, but if so, your fears were unwarranted.

Reactions are a great way to improve user engagement and interaction, so let's add them to our notes! You may be surprised at just how quick and easy it is to do.

In fact, here in Part 14 of Building with XenForo 2, we implement reactions for our notes content items in just over twenty minutes, including the time it takes for @Kier to waffle on about technical details!

Necessarily, this video also touches on the use of content type fields to provide the reaction_handler_class identification for the demo_pad_note content type...
This implementation gives a small error when push notifications are enabled. Does anybody know what the fix is for this please?

  • Error: Call to a member function getPushTemplateName() on null

  • src/XF/Service/Alert/Pusher.php:53
  • Generated by: Lee

  • Jan 5, 2022 at 12:58 AM


Stack trace​

#0 src/XF/Service/PusherTrait.php(187): XF\Service\Alert\Pusher->getNotificationBody()
#1 src/XF/Repository/UserAlert.php(163): XF\Service\Alert\Pusher->push()
#2 src/XF/Repository/UserAlert.php(101): XF\Repository\UserAlert->insertAlert(3, 1, 'Lee', 'tls_thoughts_th...', 22, 'reaction', Array, Array)
#3 src/XF/Reaction/AbstractHandler.php(186): XF\Repository\UserAlert->alertFromUser(Object(SV\ReportImprovements\XF\Entity\User), Object(SV\ReportImprovements\XF\Entity\User), 'tls_thoughts_th...', 22, 'reaction', Array)
#4 src/XF/Repository/Reaction.php(201): XF\Reaction\AbstractHandler->sendReactionAlert(Object(SV\ReportImprovements\XF\Entity\User), Object(SV\ReportImprovements\XF\Entity\User), 22, Object(TLS\Thoughts\Entity\Thought), 1)
#5 src/XF/Repository/Reaction.php(142): XF\Repository\Reaction->insertReaction(1, 'tls_thoughts_th...', 22, Object(SV\ReportImprovements\XF\Entity\User), true, false)
#6 src/XF/ControllerPlugin/Reaction.php(65): XF\Repository\Reaction->reactToContent(1, 'tls_thoughts_th...', 22, Object(SV\ReportImprovements\XF\Entity\User), true)
#7 src/XF/ControllerPlugin/Reaction.php(19): XF\ControllerPlugin\Reaction->actionToggleReaction(Object(TLS\Thoughts\Entity\Thought), 'thought/reactio...', 'thought')
#8 src/XF/ControllerPlugin/Reaction.php(12): XF\ControllerPlugin\Reaction->actionReact(Object(TLS\Thoughts\Entity\Thought), 'thought', 'thought/react', 'thought/reactio...')
#9 src/addons/TLS/Thoughts/Pub/Controller/Thought.php(149): XF\ControllerPlugin\Reaction->actionReactSimple(Object(TLS\Thoughts\Entity\Thought), 'thought')
#10 src/XF/Mvc/Dispatcher.php(350): TLS\Thoughts\Pub\Controller\Thought->actionReact(Object(XF\Mvc\ParameterBag))
#11 src/XF/Mvc/Dispatcher.php(257): XF\Mvc\Dispatcher->dispatchClass('TLS\\Thoughts:Th...', 'React', Object(XF\Mvc\RouteMatch), Object(TLS\Thoughts\Pub\Controller\Thought), NULL)
#12 src/XF/Mvc/Dispatcher.php(113): XF\Mvc\Dispatcher->dispatchFromMatch(Object(XF\Mvc\RouteMatch), Object(TLS\Thoughts\Pub\Controller\Thought), NULL)
#13 src/XF/Mvc/Dispatcher.php(55): XF\Mvc\Dispatcher->dispatchLoop(Object(XF\Mvc\RouteMatch))
#14 src/XF/App.php(2344): XF\Mvc\Dispatcher->run()
#15 src/XF.php(512): XF\App->run()
#16 index.php(20): XF::runApp('XF\\Pub\\App')
#17 {main}

I followed the development video from Kiers series and the result is this error, when push notifications are enabled.

Does anybody have any information that can point me in the correct direction for fixing this please? :)

Additionally, I am curious as to the correct way to actually trigger an alert upon reaction. Can anybody share some information on how to achieve this please? :)

Thank you.


Well-known member
If you look at the code pointed by the error:
$templateName = $handler->getPushTemplateName($alert->action);

It seems the $handler variable is not set, meaning you did not create an Alert Handler corresponding to your content type (tls_thoughts_...).
Did you create an alert handler class on the content types development admin page ?

There is already an alert sent upon reaction if you looked at the reaction AbstractHandler (src/XF/Reaction/AbstractHandler.php).