PDO's fetch method passes wrong parameter to constructor class (in Yii) - pdo

Question

Model class MyModel has following behavior
public function behaviors() {
return [
'CTimestampBehavior' => [
'class' => 'zii.behaviors.CTimestampBehavior',
'createAttribute' => null,
'updateAttribute' => 'update_time',
'setUpdateOnCreate' => true
]
];
}
In code, in controller I write something like
$model = new MyModel();
$dataReader = Yii::app()->db->createCommand()
->selectDistinct('some fields')
->from('MyModel')
->leftJoin('some table')
->where('some criteria')
->query();
while ($item = $dataReader->readObject('MyMode', $model->getAttributes())) {
**//!!! HERE item array is with model attributes, which are empty**
$items[] = $item;
}
disaster, it's not working, items is array, each of element holding empty list of attributes, like no data fetched from db
If I write
$dataReader = Yii::app()->db->createCommand()
->selectDistinct('some fields')
->from('MyModel')
->leftJoin('some table')
->where('some criteria')
->query();
while ($item = $dataReader->readObject('MyModel', MyModel::model()->getAttributes())) {
//!!! HERE item array is with model attributes, which hold correct data, taken from db
$items[] = $item;
}
it's working
If I get rid off CTimestamp behavior, both cases work.
If I debug first case, I realize that, after pdo fetchobject is done, it calls constructor with scenario="current_timestamp()". Question is why? And where I missstepped?

Answer 1

If you read readObject() documentation you will find that second argument is not list of fields, but list of constructor arguments. CActiveRecord has only one constructor argument - $scenario. $dataReader->readObject('MyMode', $model->getAttributes()) essentially assigns random value as scenario, since it will get first value from $model->getAttributes(). In your case you probably need:
$item = $dataReader->readObject('MyModel', []);