Jump to content

Hooks inheritance

Recommended Posts


I'm currently working on a module that provides controller (as from mvc patterns) functionality for gathering data for page rendering (more to come soon).

And now I'm facing a specific problem:

I created an abstract controller class (lets say AbstractController) that extends WireData. This controller class is ment to be sub classed in ProcessWire projects by the project developers for each template that needs additional data to display.

Now this abstract controller should get a hookable render() method. So I defined public function ___render().

Now if I try to hook in from another plugin via $this->addHookBefore('AbstractController::render', $this, 'doStuff'); nothing happends.

Lets assume I have a HomeController extending AbstractController providin data for the home template.

Now I can hook in via $this->addHookBefore('HomeController::render', $this, 'doStuff'); because HomeController inheritats the ___render() methods from its parent.

The problem is, I don't want to hook into every concrete controller but into their common parent, the AbstractController, instead.

Is there any solution to this problem?



Share this post

Link to post
Share on other sites

Hi Marco,

You can't instantiate an abstract class and call methods on it.

Does it work if you don't make the parent controller abstract?

Share this post

Link to post
Share on other sites

This has nothing to do with my AbstractController being abstract or not.

The problem is, that the base class provides a hook and is designed to be subclassed. But users can't hook into the method (in this case ___render()) of the base class but would have to hook into every ___render() method of all subclasses which makes this form of abstraction unusable in a ProcessWire context,.

Share this post

Link to post
Share on other sites


My class (AbstractController) that provides the hook method (___render()) is located in a namespace (nw\Controllers\AbstractController).

So hooking into this method requires a fully qualified class name:

$this->addHookBefore('nw\Controllers\AbstractController::render', $this, 'doStuff');

  • Like 1

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By VeiJari
      Hello forum!
      I've yet again stumbled on a head-scratching situation. We have enabled the option on our articles template and events template that it skips the title adding part and goes straight to the form. This is what our customer wants. So when you add a new article or event it automatically names it temporary to "article-0000000" and same with event. Now the problem is that obviously after saving the form we want to change to page url or "name" to the title, like it's normally. 
      Now here's the code for the hook:
      wire()->addHookBefore("Pages::saved(template=tapahtuma|artikkeli)", function($hook) {
        $page = $hook->arguments(0);
        $newUrl = wire()->sanitizer->pageName($page->title); // give it a name used in the url for the page
        $page->setAndSave('name', $newUrl);
      I get the correct page and the name and path changes when I log them, but when I try to save it. It just loads and then I get: 
      Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 262144 bytes) This happens in sanitizer.php
      and then another error: Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 262144 bytes) in Unknown on line 0
      What is happening? Am I not suppose to use sanitizer in this way? When we made a temporary page object in out other hook, the sanitizer worked perfectly.
      Thanks for the help!
    • By VeiJari
      Hello forum! I'm trying to learn how to time up my functions by using lazycron but I can't get it fired up. 
      Here's my code in site/init.php:
      function setEventToRepeat(HookEvent $e) { $wire->log->message("kutsutaan cron"); $events = $wire->pages->find('template=tapahtuma'); die(var_dump($events)); $wire->log->message('Kaikki tapahtumat haettu:' .$events); }   $wire->addHook('LazyCron::every30Seconds', null, 'setEventToRepeat'); I get nothing in the logs and can't echo or dump anything
      Thanks for the help!
    • By louisstephens
      So I have been diving into hooks lately, and I am enjoying them thus far. However, I guess I am a bit stumped on how to achieve what I want too. I am trying to set up a hook that would create a new child page when the parent page is saved. However, when you save the parent page a second time, I just need to update the child page without creating multiple child pages. What would be the best way to go about this?
      So after rereading my post, I believe it is a bit vague so I will try to explain more. 
      The Goal:
      Create a page with a template "one". Once the page is created/saved => create a new child page with the template of "two" If the parent is saved anytime after, do nothing to the child page (limit the parent page to one child page) The parent page is really just being used to output content, whereas the child page is being used to pull out the some fields from the parent to be used elsewhere. I might have made this too complicated in my head.
    • By quickjeff
      Hi Guys,
      I am running a page template that contains a filter form that allows users to display results based on number of  comments. 
      Here is what I am thinking about doing: 
      -add new field called total_comments 
      -somehow populate this field every time a new comment is added or removed by admin with count($page->comments)
      -use form filter to display results that the selector form has found.
      Example: $selector = “total_comments>=$q”; 
      My question to everyone: Is this a good approach? If so how do I get another field to update based on the comment module adding or removing a comment? 
    • By Mustafa-Online
      I got a field with a type of "files" named: course_file .. how can I upload it to custom directory??
  • Create New...