The setOrderByRelationshipId actor-chain is used to update the quantities of items within the cart using the CommerceItem or the shipping group relationship ID.

Parameters: None

Update Shopping Cart by Relationship ID Example

curl -L -v -b customer_cookies.txt -H "Content-Type: application/json"
"http://localhost:8280/rest/model/atg/commerce/order/purchase/CartModifierActor/
setOrderByRelationshipId?r99090004=4"