[{"key":1},{"key":2},{"_id":ObjectId("611544454c8876b533b5453d"),"description":"item.description","id":1,"name":"item.name","newlyAdded":true,"periodType":"item.periodType","productBillingCodeID":"parseInt(item.productBillingCodeID)","unitCost":"item.unitCost","unitPrice":"item.unitPrice"}]

db.collection.update({id:1},[{$set:{id:1,description:"item.description",name:"item.name",periodType:"item.periodType",unitCost:"item.unitCost",unitPrice:"item.unitPrice",productBillingCodeID:"parseInt(item.productBillingCodeID)",newlyAdded:{$eq:[{$type:"$newlyAdded"},"missing"]}}}],{upsert:true})