core: 优化record_main查询速度

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.34.0",
+    "version": "2.34.1",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/record.ts

@@ -14,7 +14,6 @@ import record from '../model/record';
 import * as contest from '../model/contest';
 import user from '../model/user';
 import TaskModel from '../model/task';
-import paginate from '../lib/paginate';
 import * as bus from '../service/bus';
 import {
     Route, Handler, Connection, ConnectionHandler, Types, param,
@@ -62,7 +61,10 @@ class RecordListHandler extends Handler {
         }
         let cursor = record.getMulti(domainId, q).sort('_id', -1);
         if (!full) cursor = cursor.project(buildProjection(record.PROJECTION_LIST));
-        const [rdocs] = invalid ? [[] as RecordDoc[]] : await paginate(cursor, page, full ? 10 : system.get('pagination.record'));
+        const limit = full ? 10 : system.get('pagination.record');
+        const rdocs = invalid
+            ? [[] as RecordDoc[]]
+            : await cursor.skip((page - 1) * limit).limit(limit).toArray();
         const canViewProblem = this.user.hasPerm(PERM.PERM_VIEW_PROBLEM);
         const canViewProblemHidden = (!!tid) || this.user.hasPerm(PERM.PERM_VIEW_PROBLEM_HIDDEN);
         const [udict, pdict] = full ? [{}, {}]

packages/hydrooj/src/model/record.ts

@@ -1,3 +1,4 @@
+/* eslint-disable object-curly-newline */
 import {
     ObjectID, Collection, UpdateQuery,
     PushOperator, MatchKeysAndValues, OnlyFieldsOfType,
@@ -232,5 +233,13 @@ bus.on('domain/delete', (domainId) => Promise.all([
     RecordModel.coll.updateMany({ pdomain: domainId }, { $set: { docId: -1 } }),
 ]));
 
+bus.on('app/started', () => {
+    RecordModel.coll.createIndexes([
+        { key: { 'contest.tid': 1, hidden: 1, _id: -1 }, name: 'basic' },
+        { key: { 'contest.tid': 1, hidden: 1, uid: 1, _id: -1 }, name: 'withUser' },
+        { key: { 'contest.tid': 1, hidden: 1, pid: 1, _id: -1 }, name: 'withProblem' },
+    ]);
+});
+
 export default RecordModel;
 global.Hydro.model.record = RecordModel;