public function testDateCastingUsingExists()
{
Galleries::config(array('schema' => array('_id' => 'id', 'created_at' => 'date')));
$gallery = Galleries::create(array('created_at' => time()));
$gallery->save();
$result = Galleries::first(array('conditions' => array('created_at' => array('$exists' => false))));
$this->assertNull($result);
}