Mercado Livre has made an update that allows the inclusion of more than one different item in the cart. The so-called multi-item cart brought a new logic for handling the identification of orders and products, which made it necessary to change the way VTEX works with these data.

With the new feature, Mercado Livre began to display only one ID for the order, regardless of the amount of products added in the cart. However, the back-end doesn't work with this data, assigning a different ID for each item, plus a unique ID for the shipping.

This means that the unique order identification code is only displayed on the end-user screen and is not part of the data that's shared with other systems (such as VTEX platform).

Mercado Livre sends to VTEX the IDs processed in the back-end: both the delivery ID and the individual item IDs. Because the unique order ID is not sent to our platform, we had to make a change in our integration with Mercado Livre.

Instead of using the IDs of each item (which would generate separate orders in our system), we've changed the logic and started considering the delivery ID to identify the order as a whole. That way, the integration works with only the shipping code (shipment_Id), the only one provided by Mercado Livre that is shared by all products of the same order.

You can find both IDs through the report generated on the integration's panel on VTEX Admin.

This logic of operation applies to all types of delivery, except those that include pickup points. In such, the platform continues to use the old ID.