fixed a bug

server/models/SudokuRecord.ts

@@ -1,13 +1,14 @@
 import mongoose, { Document, Schema } from 'mongoose';
 
 export type SudokuDifficulty = 'easy' | 'medium' | 'hard';
+export type SudokuGameMode = 'standard' | 'irregular';
 
 export interface ISudokuRecord extends Document {
   userId: mongoose.Types.ObjectId;
   username: string;
   fullname: string;
   difficulty: SudokuDifficulty;
-  gameMode: 'standard' | 'irregular';
+  gameMode: SudokuGameMode;
   timeSeconds: number;
   won: boolean;
   createdAt: Date;
@@ -18,7 +19,7 @@ export interface ISudokuLeaderboardRecord {
   userId: mongoose.Types.ObjectId;
   username: string;
   fullname: string;
-  gameMode: 'standard' | 'irregular';
+  gameMode: SudokuGameMode;
   bestTime: number;
   totalGames: number;
   wonGames: number;
@@ -69,7 +70,7 @@ sudokuRecordSchema.index({ difficulty: 1, won: 1, gameMode: 1, timeSeconds: 1 })
 
 sudokuRecordSchema.statics.getLeaderboard = function(
   difficulty: SudokuDifficulty,
-  gameMode: 'standard' | 'irregular' | 'all',
+  gameMode: SudokuGameMode | 'all',
   skipCount: number,
   pageSize: number
 ): mongoose.Aggregate<ISudokuLeaderboardRecord[]> {
@@ -134,6 +135,7 @@ sudokuRecordSchema.statics.getLeaderboard = function(
 interface SudokuRecordModel extends mongoose.Model<ISudokuRecord> {
   getLeaderboard(
     difficulty: SudokuDifficulty,
+    gameMode: SudokuGameMode | 'all',
     skipCount: number,
     pageSize: number
   ): mongoose.Aggregate<ISudokuLeaderboardRecord[]>;