core: fix addAdditionalFile

packages/hydrooj/src/model/problem.ts

@@ -1,6 +1,4 @@
-import {
-    escapeRegExp, pick,
-} from 'lodash';
+import { escapeRegExp, pick } from 'lodash';
 import { FilterQuery, ObjectID } from 'mongodb';
 import type { Readable } from 'stream';
 import { streamToBuffer } from '@hydrooj/utils/lib/utils';
@@ -267,7 +265,7 @@ export class ProblemModel {
     static async addAdditionalFile(domainId: string, pid: number, name: string, f: Readable | Buffer | string, skipUpload = false) {
         const [[, fileinfo]] = await Promise.all([
             document.getSub(domainId, document.TYPE_PROBLEM, pid, 'additional_file', name),
-            skipUpload || storage.put(`problem/${domainId}/${pid}/additional_file/${name}`, f),
+            skipUpload ? '' : storage.put(`problem/${domainId}/${pid}/additional_file/${name}`, f),
         ]);
         const meta = await storage.getMeta(`problem/${domainId}/${pid}/additional_file/${name}`);
         const payload = { name, ...pick(meta, ['size', 'lastModified', 'etag']) };