Remove activities when deleting work item

server/src/api/routes/WorkItemRoutes.js

@@ -25,6 +25,15 @@ export class WorkItemRoutes extends BaseRoutes {
       )
   }
 
+  async deleteItem(req, res, next) {
+    super.deleteItem(req, res, next)
+
+    const id = req.params._id
+    const Activity = this.db.Activity
+
+    await Activity.remove({ workItem: id })
+  }
+
   async listWorkItemActivities(req, res, next) {
     const WorkItem = this.db.WorkItem
     const aggregate = WorkItem.aggregate()