Added missing result.rowsAffected check

Dan McGhan · Dan McGhan · commit d4a072baacff · 2018-07-16T12:04:43.000-04:00
diff --git a/javascript/rest-api/part-4-handling-post-put-and-delete-requests/hr_app/db_apis/employees.js b/javascript/rest-api/part-4-handling-post-put-and-delete-requests/hr_app/db_apis/employees.js
@@ -93,7 +93,7 @@ async function update(emp) {
   const employee = Object.assign({}, emp);
   const result = await database.simpleExecute(updateSql, employee);
 
-  if (result.rowsAffected === 1) {
+  if (result.rowsAffected && result.rowsAffected === 1) {
     return employee;
   } else {
     return null;
