Any good patterns for using the update SOAP endpoint? I've figured enough out where I know I first need to get the record, then make my changes, and then send it back. In my scenario, I'm dealing with ItemFulfillments. First attempt, I was getting an error:

You do not have permissions to set a value for element shipmentweightfedex due to one of the following reasons: 1) The field is read-only; 2) An associated feature is disabled; 3) The field is available either when a record is created or updated, but not in both cases.

So I set the

ignoreReadOnlyFields

prop on the preferences in the request body. Second attempt, I get:

The Return Shipping Address must be complete when requesting a Return Shipping Label.

I don't even see Return Shipping Address in the payload. Really I'm just trying to change one field of the fulfillment. Is there a better approach?

follow the recommendations from update

Right - ideally I only set the field(s) I want to change, in addition to the internalid. I tried that, but was getting an error about a required field.

you also want to make sure that whatever custom form you are using has reasonable mandatory and default values

Thanks for the info. I was able to circle back with setting the preferences "ignoreReadOnlyFields" and get it to do what I need without doing a get first.