Hi
I saving an dataobject 'userbrille' via a frontend form.

The dataobject includes a has_one relation to file.

After saving a new 'userbrille' I want to access the file wich is an image
to resize it. But I don't know who to do it.

the object:

	static $db = array (
		'Name' => 'Text',
		'Email' => 'Text'
	);

	static $has_one = array (
		'Bild' => 'File'
	);

saving a new UserBrille:

$neuesBild = new UserBrille();
$neuesBild->setField('Name',$data->getVar('Name'));
$neuesBild->setField('Email',$data->getVar('Email'));
$neuesBild->setField('BildID',$data->getVar('BildID'));
$neuesBild->write();
//return $neuesBild->renderWith(array('UserBrillePageCrop'));

--->>??ACCESS TO THE FILE

return $neuesBild->relObject('File.Filename');

This produces an error:
UNable to travers to related object field.

Thanks in advance for any advice

Salut
Lukin

Before we get to the question you asked you could have written the write code like this...

$neuesBild = new UserBrille(); 
$neuesBild->Name = $data->getVar('Name');
$neuesBild->Email = $data->getVar('Email'); 
$neuesBild->BildID = $data->getVar('BildID'); 
$neuesBild->write(); 

or even better like this...

$neuesBild= new UserBrille($data);
$neuesBild->write();

and to get your has_one...

$doFile = $neuesBild->Bild();

hej swaiba thanks for the help

$neuesBild= new UserBrille($data);
is not working cause it wants an array and gets string (Name=test&Email=test@test.de&BildID=65)

Does silerstripe offer a convert-function for that out of the box?

salut

ah yes, sorry older version... try...

$neuesBild= new UserBrille($data->getVars()); 

ah yeah :) thanks a lot man!

Hi @swaiba,

> and to get your has_one...
> $doFile = $neuesBild->Bild();

This pattern doesn't ever seem to work for me. For example,

	public static $has_one = array(
		'PrimaryImage' => 'Image',
		'ThumbnailImage' => 'Image'
	);

	public function ThumbnailImage()
	{
		$imgObj = $this->ThumbnailImage();  // throws unknown PHP error here, not able to debug
		...
	}

I've also tried
$imgObj = $this->getThumbnailImage(); // throws unknown php error
$imgObj = $this->dbObject('ThumbnailImage'); // succeeds but doesn't return anything

Am I missing something obvious? (very possible :-) )

throws unknown PHP error here, not able to debug

hmmmm... not sure that makes sense to me... I can always debug, I use NetBeans to step through, Debug:: stuff and there are also some basic PHP / SS settings to ensure errors are recorded/shown. And I can't really help without some php error to work with!

oh DUH, it's because I used the same method name and caused an infinite recursion. I should have used parent:: .

The following works now... templates can always call $ThumbnailImage and the data model provides the fallback, transparently:

	public function ThumbnailImage()
	{
		$imgObj = parent::ThumbnailImage();
		if (!$imgObj->exists())  $imgObj = $this->PrimaryImage();
		return $imgObj;
	}

I also learned the hard way that a has_one object always "exists" in an object sense, so line 2 of the above function could not be "if (!$imgObj)" or "if (is_null($imgObj))" which works elsewhere. Here, we had to use the provided "exists()" method of the object.