Hi,

does anybody know, how to get the saved value from a TrreDropdownField. How can you use "objectForKey"?
Can anybody give an example?

new TreeDropdownField('BannerLinkInternID', 'Bitte eine interne Verlinkung wählen', 'SiteTree', 'ID', 'Title', true);

Greetings, Carsten.

does anybody know, how to get the saved value from a TrreDropdownField. How can you use "objectForKey"?
Can anybody give an example?

Not exactly sure what you mean by objectForKey but what I think your getting at is how you get the BannerLinkIntern object. Well with a TreedropdownField you should have setup a has_one relation on that page of 'BannerLinkIntern' => 'SiteTree' so to access the object in templates you can use $BannerLinkIntern to access the related page or in the PHP $this->BannerLinkIntern() to get the object.

Hi Willr,

thats all clear and works fine. But if i choose "home" from the list (for e.g.) and save the date to the db, then the page (backend) is reloaded and the value of the list is: "(Choose or type search)".

What do i have to do to show "Home" as the selected value after saving the data to DB?

objectforkey: [url=http://api.silverstripe.com/2.4/forms/fields-relational/TreeDropdownField.html#methodobjectForKey][url]http://api.silverstripe.com/2.4/forms/fields-relational/TreeDropdownField.html#methodobjectForKey

Thanks for your reply, Carsten.

Sounds like the 'home' value isn't saving. Have you got a has_one relationship setup correctly between this page and sitetree and ran a /dev/build. You should after building a correct has_one relationship a column in your database 'BannerLinkInternID' if you don't have this column then the treedropdownfield cannot save its value.

I'm having the same problem, the field isn't saving back to the database. I can't get the link from my template and the field shows Choose a page rather than the page I selected.

The code I'm using is:

class Module extends Page {
static $db = array(
);
static $has_one = array(
'Photo' => 'Image',
'Header' => 'Image',
'LinkedPage' => 'SiteTree'
);
static $defaults = array(
"ShowInMenus" => 0,
);
static $can_be_root = false;
static $default_parent = 'HomePage';

function getCMSFields() {
$fields = parent::getCMSFields();
$fields->addFieldToTab("Root.Content.Main", new ImageField('Header'));
$fields->addFieldToTab("Root.Content.Main", new ImageField('Photo'));
$fields->addFieldToTab('Root.Content.Main', new TreeDropdownField('LinkedPage', 'Page to link to', 'SiteTree'));
$fields->removeFieldFromTab('Root.Content.Main', 'MenuTitle');
$fields->removeByName('Metadata');
return $fields;
}

}

and in the template

$LinkedPage.Link

Am I doing something wrong or is this a bug?

Cheers,

James Bench

You need to use LinkedPageID instead of LinkedPage in your treedropdownfield constructor.

Cheers, that's fixed it :-)

I'm a clouts, again I don't know what I'm doing wrong.
Same as above not getting id saved into the has_oneID field in the database.

static $has_one = array(
"LinkTo" => "SiteTree"
);

in getCMSFields_forPopup I'm adding and to and returning

$fields->addFieldToTab( 'Root.Main', new TreeDropdownField("LinkToID", "Link To This Page","SiteTree"));

I'm also trying SimpleTreeDropdownField as well, neither work.
Doing a little homepage captions dataobject, there's only about 3, easier enough to swap out manually. But I like using Silver Stripe to the EXTREME! :P
p.s. using SS 2.4