revert extract partition key (#1935)

src/Utils/QueryUtils.ts

@@ -96,7 +96,9 @@ export const extractPartitionKeyValues = (
   const partitionKeyValues: PartitionKey[] = [];
   partitionKeyDefinition.paths.forEach((partitionKeyPath: string) => {
     const partitionKeyPathWithoutSlash: string = partitionKeyPath.substring(1);
+    if (documentContent[partitionKeyPathWithoutSlash]) {
       partitionKeyValues.push(documentContent[partitionKeyPathWithoutSlash]);
+    }
   });
   return partitionKeyValues;
 };