How to update and delete in documentSet ?

[madani]

output:
"attribute" : [
{
"attributeGuid" : "fixedTag",
"viewOrder" : "0"
},
{
"attributeGuid" : "fixedTitle",
"viewOrder" : "1"
}
],
"description" : "Tag Content",
"guid" : "tag"

question: how to update/delete attributeGuid:fixedTag to attributeGuid:fixedContent ??

i did just:
$profile = Models_Mongo_Profile::one(array('guid'=>'tag'));
$attribute = $profile->attribute->new();
$attribute->attributeGuid = 'fixedContent'
$attribute->save();

but that didn't work, it created new documents

when i try :
class Models_Mongo_Profile extends Shanty_Mongo_Document
{
protected static $_db = 'monggo';
protected static $_collection = 'profile';
protected static $_requirements = array(
'guid' => 'Required',
'attribute' => 'DocumentSet',
'attribute.$.attributeGuid' => 'Required',
'attribute.$.defaultValues' => array('Required' => null),
'attribute.$.viewOrder' => array('Required' => null)
);
}

$profile = Models_Mongo_Profile::one(array('guid'=>'tag'));
$profile->attribute->find(array('viewOrder'=>0));

error:
Shanty_Mongo_DocumentSet::$_collection is null

[tholder]

You're best of creating your own documentset class and then putting any functions in there you need. Then, the definition in your document looks something like:

'photos' => array('DocumentSet:Model_Mongo_PhotosDocumentSet'),
'photos.$' => array('Document'),

Then your custom documentset class looks something like:

class Model_Mongo_PhotosDocumentSet extends Shanty_Mongo_DocumentSet
{

private $_primary = false;

/**
 * Returns primary item from a plural collection.
 *
 * @return void
 * @author Tom Holder
 **/
public function getPrimary() {

    if ($this->_primary) { return $this->_primary; }

    for($i= 0; $i < count($this->_cleanData); $i++) {
        if(array_key_exists('primary',$this->_cleanData[$i])) {
            $this->_primary = $this->getProperty($i);
        }
    }

    if (!$this->_primary) {
        $this->_primary = new Shanty_Mongo_Document(array('value' => ''));
    }

    return $this->_primary;

}

Then you can do things like:

$document->photos->getPrimary()