How to get the id of a newly added entry?

Question

Yii

Hello. There is a model and an Order table. I write data to it:

$order = new Order();
$order->amount = Goods::model()->findByPk($goods_id)->price;
$order->order_date = Date('Y.m.d');
$order->save();

Further in the code, you need to use the id of this most added record. I usually just used $order->order_id. For reasons not clear to me, $order->order_id stopped storing the required id, i.e. he now does not store anything at all.
What other ways are there to get the id of the currently added record? And why do you think $order->order_id stopped working?
Thank you.

Answer 1

Has the record been added to the database? maybe a validation error or a sql error.
also see what $order->save() returns, true/false

Answer 2

$order->getPrimaryKey();
But, you may have an exception in this place if the record is not found. Better this way:

$goods = Goods::model()->findByPk($goods_id);
if ( $goods != null) {
    $order = new Order();
    $order->amount = ->$goods->price;
    $order->order_date = Date('Y.m.d');
    $order->save();
}