Hey,

Im using the SiteTree to allow the user to choose a page on the site to create a link.

The Page.php has this code

public static $has_one = array(
		
		"CaptionOneLink" => "SiteTree"
	);

public function getCMSFields() {
        $fields = parent::getCMSFields();
        $fields->addFieldToTab("Root.SliderText", new TreeDropdownField('CaptionOneLink', 'Caption 1 Link', 'SiteTree'));
        return $fields;
 }

The template file page.ss has the following:

      <a href="$CaptionOneLink.Link">Link to page</a>

In the admin section I can see the dropdown, with the pages in their. However when I select one and save it display "(Choose One)" rather than the selected page name.

When I load the page there is no link in the <a> anchor tag. I checked the database and the ID it has entered for CaptionOneLink is 0.

Is there something I'm missing? Or Documentation you can link to?

Hi,

I have been able to add a SiteTree dropdown to my DataObject pop up however I only want to show specific page types.

Is it possible to filter the pages displayed in the dropdown based on $ClassName?

This is what I have so far:

$fields->push( new TreeDropdownField('PackageType','Package Page', 'SiteTree', 'ID'));

There are many different packages available and these are split up into various types of packages which I want to be displayed on the pages of the site. Because packages can only be displayed on pages with a $ClassName of 'PackagePage' these are the only pages I want to display in the dropdown, make it easier for my client.

Any help greatly appreciated.

thanks

Marc, this is what I need to know too. Did you find the answer?

Assuming you're on 3.x, not sure about 2.x:

$tree = new TreeDropdownField('PackageType','Package Page', 'SiteTree', 'ID');
$tree->setFilterFunction(function($obj) {
	if ($obj->ClassName == "MyClass") {
		return false;
	} else {
		return true;
	}
});

This will hide any options with the class name 'MyClass'. Note that if you hide the 'MyClass' page type, its child pages will also be hidden. I've submitted a pull request to disable instead of hide them, so that child pages will still be accessible - though it'd only make it in to 3.1.1 at the earliest: https://github.com/silverstripe/silverstripe-framework/pull/2037

Oops no sorry, I am using 2.4. Is it doable in there?

Looking at the API (http://api.silverstripe.org/2.4/class-TreeDropdownField.html#_setFilterFunction) it should work in the exact same way