Error on page.update:after

The CMS Questions
1

Hi, I’m upgrading to the latest version (3.42) but I’m having an error on the page.update:after hook. The error is the following:

Exception: Error
Call to a member function template() on null

The weird thing is that I’m having this error only on the update:after event, while others event seem to run correctly (the first hook in the code below).

Any hint?

'hooks' => [

 //Scrive su db l'articolo una volta aggiornato  
 //---------------------------------------------
'page.update:after' => function ($newpage, $oldpage) {
      
    if($newpage->template() == "article") 
    {
        //Aggiorna l'articolo su db
        articleUpdate($newpage);
    }
    elseif ($newpage->template() == "selezione")
    {
        //Aggiorna la selezione
        saveSelezioneToDB($newpage);
    }
    elseif ($newpage->template() == "longform-plist")
    {
        //Aggiorna l'id del longform playlist
        updateArtSpecialID($newpage);
    }
  }, 


 //Scrive su db l'articolo quando cambio titolo  
 //---------------------------------------------
'page.changeTitle:after' => function ($page,$oldpage) {
      
    if($page->template() == "article") 
    {
        //Articoli
        articleUpdate($page);
    }
    elseif ($page->template() == "selezione")
    {
        //Liste
        saveSelezioneToDB($page);
    }
  },

  //Quando cambia il path di un longform playlist, 
  //viene cambiato il path di tutti gli articoli che ne fanno parte
  //---------------------------------------------------------------
  'page.changeSlug:after' => function ($page,$oldpage) {

      if($page->template() == "longform-plist") articleListMove($page);

  },


  //Scrive lo stato della pagina quando passa da invisibile a visibile
  //------------------------------------------------------------------
  'page.changeStatus:after' => function ($page,$oldpage) {
      
      if($page->template() == "article") 
      {
          //Articoli
          articleUpdate($page);
      }
      elseif ($page->template() == "selezione")
      {
          //Liste
          saveSelezioneToDB($page);
      }
  },


  //Elimina un articolo dal db quando viene eliminato dal panel
  //-----------------------------------------------------------
  'page.delete:after' => function ($status, $page) {

    if($page->template() == "article") 
    {
      deleteArticleFromDb($page);
    }
    else if ($page->template() == "selezione")
    {
      deleteSelezioneFromDb($page);
    }

  },


  //Impedisce il salvataggio di alcune specifiche pagine a chi non ha i permessi
  //-----------------------------------------------------------

  'page.update:before' => function ($page, $values, $strings) {
      
    //if ($page->template() == 'lungo') 
    //{
        //Exception
        //throw new Exception('Non hai i permessi!');
    //}
  }

]
];

2

After 3.4, you have to use the parameter names in the hooks exactly.

For example:

Your hook:

'page.changeTitle:after' => function ($page, $oldpage) {

Should be:

'page.changeTitle:after' => function ($newPage, $oldPage) {

Hooks documentation

There is @lukasbestle migration tool about this. You can check your hooks using this tool.

Migration Tool

3.4.0 Release Notes

3

@ahmetbora thank you!

4

I read the release notes regarding hooks in 3.4.2. I wonder why to pass $newPage and $oldPage as arguments, as they are automagically available as fixed parameters.

5

Fixed parameters were before 3.4. After 3.4, the wildcard feature came to the hooks. Now you can use it in a wider scope. So we had to convert the hook parameters to the associative array.

You can find more detailed documentation here about wildcard usage: