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Using multi-instance in FieldtypePage


Ferdi Derksen
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Hi guys,

I was wondering if there is an option to load another site in the FieldtypePage by using the custom PHP code to find selectable pages.

// placed as custom PHP code to find selectable pages
return $content->pages->get("/")->children();

When it needs hooking into methods as "InputfieldPage::___getSelectablePages" or "InputfieldPage::___findPagesCode", I'd like to know how.

By just placing the following code somewhere in the methods it won't work, but maybe someone else knows how?

$content = new ProcessWire('/mypath/to/content/site/', '/content/'); // placed in subdirectory

 

Maybe it isn't even possible, but then also, I'd like to know :).

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I guess you're wrong this time ;)

With a hook I managed to accomplish my question. My finished code looks like this:

public function init() {
  $this->pages->addHookBefore('InputfieldPage::findPagesCode', $this, 'findPortalPagesCode'); 
}

public function findPortalPagesCode($event) {
    if (!$event->object->findPagesCode) return;
    $event->replace = true;

 // @TODO check for value in findPagesCode before loading $content so it won't load every time
    $content = new ProcessWire('/mypath/to/content/site/', '/content/');

    if($event->object) {}

    $pages = $this->wire('pages'); // so that it is locally scoped to the eval
    if(empty($event->object->findPagesCode)) $event->return = $pages->newPageArray();
    $event->return = eval($event->object->findPagesCode);
}

At the fieldsettings I placed my custom PHP code as selector like this:

return $content->find("template=news");

 

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True, but I don't want to mix, these pages are only be available in certain cases. Because these fields are only set for a specific template we can get content from another PW installation and won't mix them up with the original installation.

Have to say I should have mentioned that indeed.

For this purpose only I also set a hook on InputfieldPage::getSelectablePages to be certain we could get the page when the current page has the same ID as in the other installation.

// in short I removed this bit
if($children && $children->has($page)) {
  $children->remove($page); // don't allow page being edited to be selected
}

 

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And just to make that one clear, you shouldn't even need to hook anything. This should just work fine by putting this into the custom php code for the field:

$contentWire = new ProcessWire('/mypath/to/content/site/', '/content/');
return $contentWire->wire('pages')->find('…');

If you want to maintain the reference throughout the request (not creating the instance multiple times) I'd suggest doing this in the init/ready.php:

$contentWire = new ProcessWire('/mypath/to/content/site/', '/content/');
$this->wire('content', $contentWire, true);

This does register a new processwire api variable $content for the second instance, available in custom php code like this:

return $this->wire('content')->wire('pages')->find('…');

 

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That's not correct. $page and $pages are the only api variables preregistered as local variables. Other processwire api variables are available via the access method in classes: $this->wire('api-name'). And you can always create as many own variables as you like in there. Nobody needs you to use the local variables $pages/$page for the code. They're just there for convenience.

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Tnx for the input, but unfortunately I didn't get that to work, it results in a fatal error;

Fatal error: Call to a member function wire() on a non-object in /mypath/htdocs/wire/modules/Inputfield/InputfieldPage/InputfieldPage.module(283) : eval()'d code on line 1

Placed in my ready.php file:

$contentWire = new ProcessWire('/mypath/to/content/site', '/content/');
wire('content', $contentWire, true); // using $this->wire.... didn't work

Placed in the field PHP code:

return $this->wire('content')->wire('pages')->find("parent=/");

 

I hope you have any thoughts left? Thanks in advance!

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  • 7 months later...
On 12/7/2016 at 9:24 AM, Ferdi Derksen said:

Tnx for the input, but unfortunately I didn't get that to work, it results in a fatal error;

Fatal error: Call to a member function wire() on a non-object in /mypath/htdocs/wire/modules/Inputfield/InputfieldPage/InputfieldPage.module(283) : eval()'d code on line 1

Placed in my ready.php file:


$contentWire = new ProcessWire('/mypath/to/content/site', '/content/');
wire('content', $contentWire, true); // using $this->wire.... didn't work

Placed in the field PHP code:


return $this->wire('content')->wire('pages')->find("parent=/");

 

I hope you have any thoughts left? Thanks in advance!

 

I know this is old, but I think your error might be because you're trying to attach $content to the current instance of ProcessWire.

I think it might work if you did this:

return $content->wire('pages')->find("parent=/");

 

Since $content is a new instance of ProcessWire, you should be able to do things like this:

$contentModules = $content->wire('modules');
$contentForms = $contentModules->get('FormBuilder');

 

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