mongodb_add.php
insertArr = [
[
'_id' => new \MongoDB\BSON\ObjectId(),
'name' => 'teste
]
];
$collection = $this->mongo->webapp->hosting;
$collection->updateOne(
['_id' =>new \MongoDB\BSON\ObjectId($hostingId), 'rooms._id' => new \MongoDB\BSON\ObjectId($roomId)],
['$push' => ['rooms.$.media' => ['$each' => $insertArr ]]]
);