Aggregate.group中示例结果不正确
https://developers.weixin.qq.com/miniprogram/dev/wxcloud/reference-sdk-api/database/aggregate/Aggregate.group.html {
"_id": {
"region": "asia",
"maxScore": 100
},
"totalCoins": 100
}
其中totalCoins应该是40，不应该是100。因为符合条件的记录只有这1条： {
_id: "4",
alias: "john",
region: "asia",
scores: [30, 60, 100, 90],
coins: 40
}