Question

我试图运行

db.user.find({_id: { $in : ['561f9f6aae729de84253b8b7','561f9f72ae729de84253b8b9'] } } )

即使结果存在，它也不会返回任何结果。这个查询有什么问题吗？

{
    "_id": ObjectId("561f9f58ae729de84253b8b5"),
    "__v": NumberInt(0),
    "email": "Jay@admin.com",
    "gameStatus": "Left game",
    "isJudge": false,
    "isOnline": false,
    "login_at": ISODate("2015-10-15T12:43:04.346+0000"),
    "name": "Jay"
}, {
    "_id": ObjectId("561f9f6aae729de84253b8b7"),
    "__v": NumberInt(0),
    "email": "sunil@admin.com",
    "gameStatus": "Just joined",
    "isJudge": false,
    "isOnline": true,
    "login_at": ISODate("2015-10-15T12:43:22.575+0000"),
    "name": "Sunil"
}

Answer 1

尝试使用 ObjectId（）

db.user.find({_id: { $in : [ObjectId('561f9f6aae729de84253b8b7'),ObjectId('561f9f72ae729de84253b8b9')] } } )

当与“_id”一起使用时，Mongo $ in不会返回结果

1 个答案: