I'm currently trying to adjust the line items in a particular cart/order after an event is triggered.

I've got:

use craft\commerce\Plugin as CommercePlugin;

$request = Craft::$app->getRequest();

$cart = CommercePlugin::getInstance()->getCarts()->getCart(true);

$lineItem = CommercePlugin::getInstance()->getLineItems()->getLineItemById($cart->lineItems[0]->id);

$lineItem->price = 100.0000;
$lineItem->salePrice = 100.0000;
$lineItem->qty = 1;
$lineItem->note = '';


$cart->email = $request->getParam('orderEmail');

if (!Craft::$app->getElements()->saveElement($cart)) {
   return false;

But this seems to not do anything, except update $lineItem and not update the line item when the cart is then saved.

  • 1
    Any errors on the cart after saving? Mar 15 '19 at 16:36
  • @LukeHolder No errors, and the flash just returns "Cart Updated"
    – Jason Mayo
    Mar 19 '19 at 10:59

Turns out I just replace:



CommercePlugin::getInstance()->getLineItems()->saveLineItem($lineItem, false);

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