Improve merge on update

server/src/api/routes/WorkItemRoutes.js

@@ -147,22 +147,19 @@ export class WorkItemRoutes {
     }
 
     let WorkItem = this.db.WorkItem
-    let workItemUpdates = req.body
-    let foundWorkItem = await WorkItem.findById(workItemUpdates._id)
+    let workItem = await WorkItem.findById(req.body._id)
 
-    if (!foundWorkItem) {
+    if (!workItem) {
       return next(
-        createError.NotFound(`WorkItem with _id ${_id} was not found`)
+        createError.NotFound(`WorkItem with _id ${req.body_id} was not found`)
       )
     }
 
-    // Strip off all BSON types
-    foundWorkItem = JSON.parse(JSON.stringify(foundWorkItem))
+    const workItemUpdates = new WorkItem(req.body)
 
-    const mergedWorkItem = WorkItem.hydrate(
-      merge(foundWorkItem, workItemUpdates)
-    )
-    const savedWorkItem = await mergedWorkItem.save()
+    workItem.merge(workItemUpdates)
+
+    const savedWorkItem = await workItem.save()
 
     res.json(savedWorkItem.toClient())
   }