Jump to content
Noel Boss

A hook to prefill PageTable fields with children on edit

Recommended Posts

I use a PageTable field to make edits to children of pages more intuitive

To register the hooks, insert the following Snippet inside your init function in your module (or add it to your init.php file):

/**
 * Initialize the module.
 *
 * ProcessWire calls this when the module is loaded. For 'autoload' modules, this will be called
 * when ProcessWire's API is ready. As a result, this is a good place to attach hooks.
 */
public function init()
{
	// Prefill pageTable field
	$this->wire()->addHookBefore('InputfieldPageTable::render', $this, 'addChildrenToPageTableFieldsHook');
	$this->wire()->addHookBefore('InputfieldPageTableAjax::checkAjax', $this, 'addChildrenToPageTableFieldsHook');
}

Then, add this hook method:

/**
 * Fill pagetable fields with children before editing….
 *
 * @param HookEvent $event
 */
public function addChildrenToPageTableFieldsHook(HookEvent $event)
{
	$field = $event->object;

	// on ajax, the first hook has no fieldname
	if (!$field->name) {
		return;
	}
	
	// get the edited backend page
	$editID = $this->wire('input')->get->int('id');
	if (!$editID && $this->wire('process') instanceof WirePageEditor) {
		$editID = $this->wire('process')->getPage()->id;
	}
	$page = wire('pages')->get($editID);
	
	// disable output formating – without this, the ajax request will not populate the field
	$page->of(false);
	
	// you could also insert a check to only do this with sepcific field names…
	// $page->set($field->name, $page->children('template=DesiredTemplate')); // just specific templates
	$page->set($field->name, $page->children);
}

Now whenever there is a page-table field on your page, it gets populated with the children

Edited by Noel Boss
Using $page->set() instead of ->add() removes "orphant message"
  • Like 5

Share this post


Link to post
Share on other sites

could you please mark this as [tutorial] or could an admin move it to the tutorials board? thx

  • Like 2

Share this post


Link to post
Share on other sites

@bernhard I felt my post is not qualified for a tutorial with »step-by-step instructions on how to do things in ProcessWire« – and since the description for API & Templates contains »answers and support on the API and template development« I thought it would better fit in there. I was actually looking for a hooks / snippet / recipe section in the forum – but that does not exists. I know, there is https://processwire-recipes.com but it just feels to cumbersome to add one 😉

  • Like 1

Share this post


Link to post
Share on other sites

OK i understand 🙂 I just didn't get that it was a snippet and "wasted" time to read your post and try to help where actually no problem existed and thought you might save others from that by naming it more obviously..

  • 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.

Guest
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 Guy Incognito
      I've created a simple sports league fixture generator in a template called 'League'. Teams are added as page references then a fixture list is created as a ProFields table by hooking page save to add new rows to the table.
      The bit I need help with is that I'm trying to check a fixture doesn't already exist before adding it to the table (e.g. if a new team is added to the league). I'm trying to do this with a PW selector to filter the fixtures table and check whether Team A vs Team B already exists in the table. Then on the next line checking no fixture was found by using count().
      However as soon as I add the selector the script no longer adds any rows to the table. If I take it out, it all works fine (albeit with duplicate fixtures each time the page is saved). I've also tested the selector in a page template and it filters as expected. It's late here (UK)... I'm probably doing something stupid! Any ideas?
      <?php //Hook page save to generate league fixture lists $wire->addHookAfter("Pages::saved(template=league)", function ($event) { //Get which page has been saved $page = $event->arguments(0); $noFixturesAdded = 0; //For each team in league cycle through and add home fixtures foreach ($page->teams_in_league as $teamA) { foreach ($page->teams_in_league as $teamB) { //Check if fixture already exists $existingFixtures = $page->fixtures("team_a=$teamA,team_b=$teamB"); //Check team A is not the same as team B as you can't play yourself //Then add row to fixture table if ($teamB != $teamA && $existingFixtures->count() < 1 ) { $fixture = $page->fixtures->makeBlankItem(); $fixture->team_a = $teamA->id; $fixture->team_b = $teamB->id; $page->fixtures->add($fixture); $noFixturesAdded ++; } } } //Save updates to table $page->save('fixtures'); $message = "League saved. $noFixturesAdded new fixtures were added"; $this->message($message); });  
    • By MoritzLost
      This doesn't warrant a full tutorial, but I wrote a little function that will recursively search through a repeater field to find the first non-empty field matching a list of fields to look for. I needed something like this to generate a fallback for SEO fields (og:image, og:description et c.). Here it is:
      <?php namespace ProcessWire; /** * Find the first non-empty field out of a list of fields in a repeater or repeater matrix field. * Will recursively search through nested repeaters until it finds a non-empty * field. * * @param RepeaterPageArray $repeater The field to search through. * @param array $fields A list of fields the function should look for. * @param array|null $allowed_repeater_types All the Repeater Matrix types the function will check. Leave empty to allow all. * @param array|null $allowed_repeater_fields All the repeater fields the function will check recursively. Leave empty to allow all. * @return void */ function firstRecursiveRepeaterMatch( RepeaterPageArray $repeater, array $fields, ?array $allowed_repeater_types = null, ?array $allowed_repeater_fields = null ) { // iterate over the items of the repeater foreach ($repeater as $current) { // if the function is currently inside a repeater matrix field, // skip this item if it isn't one of the allowed types, unless // allowed_repeater_types is empty (all types allowed) if ( $current instanceof RepeaterMatrixPage && is_array($allowed_repeater_types) && !in_array($current->type, $allowed_repeater_types) ) { continue; } // get all fields of the current item foreach ($current->getFields() as $field) { $name = $field->name; // if the current field is another repeater, check it recursively $fieldtype_class = $field->getFieldType()->className(); if ($fieldtype_class === 'FieldtypeRepeater' || $fieldtype_class === 'FieldtypeRepeaterMatrix') { // continue with the next item if the field name isn't one of the // allowed repeater fields, unless allowed_repeater_fields empty (null) if ( is_array($allowed_repeater_fields) && !in_array($name, $allowed_repeater_fields) ) { continue; } $deep_search = firstRecursiveRepeaterMatch( $current->get($name), $fields, $allowed_repeater_types, $allowed_repeater_fields ); // if the deep search inside the repeater // finds something, the function ends here if ($deep_search !== null) { return $deep_search; } } // if the current field name is one of the requested // fields, return it's value if it isn't empty if (in_array($name, $fields)) { $value = $current->get($name); if ( // check for empty values !empty($value) // if the value is any wirearray, check // if it has at least one item && (!$value instanceof WireArray || $value->count() > 0) ) { return $value; } } } } // if the function reaches this point, there is no match in the entire tree return null; } Can be used like this:
      $seo_description = firstRecursiveRepeaterMatch( // content sections fields, a repeater matrix with multiple types $page->sections, // look for the first non-empty instance of any of those fields ['body', 'html_basic', 'html_full'], // only check sections of the following types ['section_text', 'section_columns', 'section_accordion'], // only check the following nested repeaters recursively ['columns', 'accordion'] ); Wanted to share because I thought it could be useful to others. It should be easy to adjust the matching condition from non-emtpy fields to some other condition, depending on the use case ...
    • By Macaco
      It's a bilingual site. There are two pages: "Artists" and "Events" each with a "Page Reference" field connecting each other.
      - Artists has a field where one can choose events available.
      - Events has a field where you can either choose artists available or create new ones.
      The problems: 
      - When I create an "Artist" page and select events from the list, it doesn't update the collection of participating artists on the "Event" page.
      - When I create an artist from the "Event" page. The field 'artist page > settings > language' is not "Active" for the second language.  When the artist page is created manually,"Active" is on by default.
      I know this all have to do with hooks, but I'm don't fully understand the logics.
    • By VeiJari
      Hello forum! 
      I started to write my first hook for Processwire but I'm pretty confused how you should write these. My idea is to hook after publishing in init.php (called before templates)  for a certain template. 
       
      Here's the code: 

      Trying to reset the checkbox (ajasta) and then saving it so it shows unchecked in the admin page when publishing "article" page. 
      But the code isn't doing anything. Not even dumping anything
      What seems to be the problem? And have you made a similar hook for this usage or am I doing it totally wrong? 😄
      Thanks for the support in advance!
    • By celfred
      Hello,
      I am getting nuts trying to understand hooks and I hope someone in the community will be able to help. This is deiving me crazy ! I have tested tens of possibilities to eventually reduce my code to this :
        bd('outside');   $wire->addHookAfter('Page::render', function($event) {     bd('inside');   }); And if someone could tell me why my bd('inside'); never triggers... I would be infinitely grateful !
      EDIT : Forgot to say : this piece of code is in my _init.php included in my template (but I've also tried in my site/ready.php for no better results...)
×
×
  • Create New...