How can I update a custom Order field in a plugin controller?

Question

I have a custom plugin in which I have a controller action which I want to validate some values and then update a custom field on the Cart.

I can get the values from the form and validate them, I'm just missing how to get them saved to the Cart.

I've tried the following:

$this->cart->setRawPostContent('orderShippingOptions', $myValue);
$this->cart->setContentFromPost('fields');

And also just:

$this->cart->setContentFromPost(['orderShippingOptions' => $myValue]);

I'm feel like I'm in the right area, I'm just missing something simple.

Any help gratefully received.

Answer 1

You can do this directly as:

$cart->setContentFromPost(array( 'someKey' => $someValue ));
craft()->commerce_orders->saveOrder($cart);

(You'll need the saveOrder step as you're in your own controller, but note e.g. if you're doing this in e.g. a Commerce shipping calculator plugin, you can skip this step for efficiency reasons as a saveOrder occurs at the end of that process anyway).

Answer 2

Turns out I really overthought this one! It's exactly the same as you would usually do it in Craft.

$this->cart->getContent()->setAttributes(array(
    'orderShippingOptions' => $myValue
));

craft()->commerce_orders->saveOrder($this->cart);

The bit I was missing was craft()->commerce_orders->saveOrder($this->cart);

Answer 3

For reference, the Craft 3 version of setContentFromPost is setFieldValuesFromRequest

And you can so things like:

$order->setFieldValue("customFieldHandle", "My value");

https://docs.craftcms.com/api/v3/craft-base-elementinterface.html#public-methods