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SilverStripe Forums » General Questions » How to count all Children of a page? Including those not shown in menus
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How to count all Children of a page? Including those not shown in menus
13 July 2010 at 10:56am
Hi there
I'm writing a function which has to work out how many children a page has. I started off with this code:
public function numChildren()
{
$children = $this->Children();
return $children->Count();
}However this doesn't count the child pages that have "Show in menus" unticked.
Does anyone have a simple solution to this?
Cheers
Tama -
Re: How to count all Children of a page? Including those not shown in menus
13 July 2010 at 12:13pm
Have you tried $this->AllChildren() ?
That should do the trick.
There's not much in the docs but you can use $AllChildren.Count directly in the template if all you want to do is output the number
hth
Rich
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Re: How to count all Children of a page? Including those not shown in menus
13 July 2010 at 12:27pm
Excellent, that was exactly what I was after - thank you Rich.
What I am doing it putting in a RSS link on every page (picked up by modern browsers) but if the page hasn't got any children it points back to the parent page RSS link.
class Page_Controller extends ContentController {
public function init() {
parent::init();
//Display RSS link on every page with children. If no children display parent RSS link
if($this->numChildren()>0){
RSSFeed::linkToFeed($this->Link() . "rss");
} else {
RSSFeed::linkToFeed($this->Parent()->Link() . "rss");
}
}
public function numChildren()
{
$children = $this->AllChildren();
return $children->Count();
}function rss() {
$rss = new RSSFeed($this->Children(), $this->Link(), $this->Title." RSS Feed");
$rss->outputToBrowser();
} -
Re: How to count all Children of a page? Including those not shown in menus
13 July 2010 at 12:45pm
As a little note using $this->AllChildren()->Count is quite slow since it has to build a whole set of the pages just to get the count. If you are worried about performance then a direct count db query would be much faster. Like DB::query("SELECT COUNT(*) FROM SiteTree_Live WHERE ParentID = '$this->ID'")->value();
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Re: How to count all Children of a page? Including those not shown in menus
13 July 2010 at 12:49pm Last edited: 13 July 2010 12:50pm
Glad to help.
In that case you can save yourself a function and just put:
...
if ($this->AllChildren()->Count()>0) {
...a word of warning on using "Show in Menus", Google site maps uses this as an extra selector for deciding whether to include the page in sitemap.xml - just something to consider
Rich
EDIT: or use Willr's snippet ;)
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Re: How to count all Children of a page? Including those not shown in menus
13 July 2010 at 12:51pm
Thanks again - I might take Will's advice and go for the direct SQL query. Speed is good.
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