Check if PageArray contains pages

[marcin]

Hello,

I want to check whether PageArray contains some list of pages - as input I would like to use an array of pages' IDs. There is some elegant way to do it or I need to loop through PageArray and use $p->has("id=X")?

Thanks,

Marcin

[Wanze]

Hi marcin,

I think there's nothing wrong with looping through the array and check with $p->has('id=X').

No more elegant way popping in my mind right now

[marcin]

Yes, it's true, but probably method provided by API would be more efficient. If there's nothing like this - nothing will happen.

[Soma]

Just $pageArray-> has("id=1001|1003") will do it.

[Wanze]

@Soma nice.

The problem may be if we want to match 10 IDs like this and let's say one of them is in the array,

->has would return true? Because '|' denotes an OR operator.

So if you want to know exactly which ID is in there, the loop is necessary.

Maybe I'm wrong

[Soma]

That's what I assume he wants...

If you want to know which is in the page array use filter.

$found = $pageArray->filter("id=1001|1003|1005");
echo $found; // 1001|1003

[Wanze]

That's what I assume he wants...

If you want to know which is in the page array use filter.

$found = $pageArray->filter("id=1001|1003|1005");
echo $found; // 1001|1003

Awesome!

How could I miss this in the Cheatsheet... again learned something new, thanks!

[marcin]

Unfortunately, I need to check whether all of them are in PageArray. But big thanks for help guys.

[Soma]

Well that doesn't really come through until now...

So what now? If all of the "list" are in the PageArray (but also some others), or if the PageArray is the list 1:1... ?

Now I'm curious why you want or need that?

I would do that if you want to test if all of the list pages are in the PageArray:

$result = $pages->find("template=basic-page");
$list = $pages->getById('1001,1002');

if(count($result->filter("id=$list")) == count($list)){
    echo "all found";
}
 

[kongondo]

$pages->getById

This is new to me. I haven't seen it in the cheat sheet. Does it mean it doesn't grab the whole page object but only the IDs?

[Soma]

Yeah it's not (yet) on the Cheatsheet. No it does grab the pages by id as the name indicated

ProcessWire never does grab the "whole" pages unless you need it or a field is autojoin. It's kinda lazy loading.

[diogo]

same as $pages->find("id=1001|1002") or faster?

[marcin]

@Soma: I have attributes set as pages. So I have list of all attributes(list of pages under Attributes page) and Page inputfield in some template. Now, I want to search only these ones(from this template) which have selected all of attributes I choose.

You idea seems to be quite nice thanks.

[marcin]

OK guys, problem is probably a bit more complicated - @Soma's solution won't work if I want to search for some list of pages' IDs in multiple page field(not through all pages in system). It's a part of quite complicated search, so list of items is processed a few time - using filter() is prefered, multiple loops would probably decrease performance.

Example: I have list of pages: $itemsList - each item has attributes field(it's a page field). There is also array of attributes' IDs - I want to filter items which have all of attributes in attributes field.

Thanks,

Marcin

[ryan]

Since you are dealing with the contents of a Page reference field, already loaded in memory (it sounds like?), take a look at the WireArray section of the cheatsheet, which outlines several methods you can use. Be sure to show the "advanced" options in the cheatsheet, because there is a lot in there. Take a stab at it and post what you've got. From there, I think we'll have a better idea of what you are trying to do, as well as a solution, if you can't get it working.