If your sites support complex product-SKU relationships (for example, multiple CommerceItems with the same catalogRefId) or multiple shipping groups, then it is recommended that you modify an Order using the IDs of the ShippingGroupCommerceItemRelationship objects in the Order. Doing so makes the changes at the CommerceItem-to-ShippingGroup level.
You can use the following CartModifierFormHandler methods to modify an Order by ShippingGroupCommerceItemRelationship ID:
handleSetOrderByRelationshipId()handleRemoveItemFromOrderByRelationshipId()handleMoveToPurchaseInfoByRelId()
Refer to Understanding the CartModifierFormHandler for more information on these handle methods.
To change the quantity of an item in the Order, pass the new quantity into the ShippingpingGroupCommerceItemRelationship, as shown in the following JSP example:
<dsp:input value='<dsp:valueof param="SgCiRelationship.quantity"/>' type="text" name='<dsp:valueof param="SgCiRelationship.Id"/>'>
To delete an item from the Order, pass the ID of the associated ShippingGroupCommerceItemRelationship into the form handler’s removalRelationshipIds property, as shown in the following JSP example:
<dsp:input bean="CartModifierFormHandler.removalRelationshipIds" paramvalue="SgCiRelationship.Id" type="checkbox"/>
