fixed some bugs

app/db/repository/maintenancejob.py

@@ -71,7 +71,8 @@ def get_all_maintenance_jobs(db: Session):
             else:
                 part["image"] = base64.b64encode(part["ImageURL"]).decode("ascii")
         job_dict["TotalCost"] = calculate_total_cost(job.CarParts)
-        job_dict["AssignedTo"] = job.CreatedBy.__dict__
+        if job.Status == "Complete":
+            job_dict["FinishedBy"] = job.FinishedBy.__dict__
         job_dict["Vehicle"] = job.Vehicle.__dict__
         result.append(job_dict)
     print("Returning...")