I need to check (and take appropriate action) if the object is just being created, or if an existing object is updated with new values. Is there any way to verify this for sure?
Yes there is. The new object does not yet have an identifier, so you can check the object if it has an identifier.
Parse.Cloud.beforeSave("MyClass", function (request, response) { var object = request.object; if (!object.id) { // this is a new object } });
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