2

For updating a single cart item I am using a request like this:

PUT    /V1/carts/:cartId/items/:itemId

with body

{
    "cart_item": {
    "sku": "Some SKU here",
    "qty": 7,
    ...
    "quote_id": "1"
    }
}

However, this approach has several problems
- It doesn't work as a single request for updating multiple cart items, which is my main problem.
- It always adds quantity, but doesn't override, as mentioned here

I want to update the whole information once from client side, because it may not be convenient to request an update for each clicked button. Neither it's a good idea to send multiple updates at the end.

I'm new to this forum and Magento, please sorry for wrong formatting, and thank you for your time.

2

There appears to be no way to update multiple items in a cart in one request. Despite the way the cartItem" body is structured as an object, it seems to only allow updating one item at a time.

There are two ways to do it, but neither support mass updates as far as I can see.

Way #1:

PUT V1/carts/:cartId/items/:itemId

Body:

{
  "cartItem": {
    "item_id": :item_id, 
    "qty": :qty, 
    "quote_id": :cart_id
  }
}

Note: With the PUT it seems, if you have the :itemId in the URL, you don't seem to need to sku or item_id in the cartItem body. You still need the quote_id though.

Way #2:

POST V1/carts/:cartId/items

Body:

{
  "cartItem": {
    "item_id": :item_id, // this will overwrite qty
    //"sku": :my_sku, // this will increment qty
    "qty": :qty, 
    "quote_id": :cart_id
  }
}

It appears, in my testing, that the "qty" does indeed overwrite the quantity, and does not increment or add to existing quantity, if you are using item_id in both the PUT and POST versions.

However, if you use the POST version, and use the sku instead of item_id, then it will add new items to the cart, effectively "incrementing" the quantity of that product. So watch out for that.

  • I got an issue is that qty is added not updated(use PUT). I try to remove sku but the behaviour is still the same – Nam Trung Jul 25 at 4:44

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