在將字符串轉換爲mongo db中的對象ID時出現錯誤

Question

我有一個集合booking。在這個集合中，我有一個字段user。這個系列有24000行。 A-present user字段數據類型是字符串。我需要將user數據類型從string更新爲objectId。我嘗試了下面的腳本，但得到錯誤。 蒙戈庫版本3.2.12

> db.booking.find({user: {$exists:true}}).forEach(function(x) { 
...  x.user = ObjectId(x.user); 
...  db.booking.update({_id: x._id}, {$set: {user: x.user}}); 
... }); 
2017-09-12T10:05:30.092+0000 E QUERY [thread1] Error: invalid object id: length : 
@(shell):2:14 
DBQuery.prototype.forEach@src/mongo/shell/query.js:501:1 
@(shell):1:1 
> 

預訂收藏

{ "_id" : ObjectId("58046a49f8f888a80b00002a"), "cabinname" : "Matras-Haus", "checkin_from" : ISODate("2016-10-17T00:00:00Z"), "reserve_to" : ISODate("2016-10-20T00:00:00Z"), "user" : "57877d23049ac1b819000029", "beds" : "2", "dormitory" : "1", "sleeps" : "3", "clubmember" : "1", "status" : "4", "comments" : "", "bookingdate" : ISODate("2016-10-17T06:06:01Z"), "reservation_cancel" : "2", "is_delete" : NumberLong(1), "payment_status" : "1" } 
{ "_id" : ObjectId("58183678d2ae67a404431d5c"), "cabinname" : "Kemptner Hütte", "checkin_from" : ISODate("2016-10-31T23:00:00Z"), "reserve_to" : ISODate("2016-11-23T23:00:00Z"), "user" : "57877d23049ac1b819000029", "beds" : "2", "dormitory" : "0", "sleeps" : "2", "clubmember" : "0", "status" : "1", "total_price" : "1288", "payon_cabin" : "1288", "bed_prefer" : "0", "guests" : "2", "comments" : "", "prepayment_amount" : "0", "bookingdate" : ISODate("2016-11-01T06:30:16Z"), "reservation_cancel" : "2", "is_delete" : NumberLong(1), "payment_status" : "0" } 
{ "_id" : ObjectId("581b31f3d2ae674d5f431d5b"), "cabinname" : "Kemptner Hütte", "checkin_from" : ISODate("2016-11-07T23:00:00Z"), "reserve_to" : ISODate("2016-11-17T23:00:00Z"), "user" : "", "beds" : "3", "dormitory" : "0", "sleeps" : "3", "clubmember" : "0", "status" : "1", "total_price" : "840", "payon_cabin" : "840", "bed_prefer" : "0", "guests" : "3", "comments" : "", "prepayment_amount" : "0", "bookingdate" : ISODate("2016-11-03T12:47:47Z"), "reservation_cancel" : "2", "is_delete" : NumberLong(1) } 
{ "_id" : ObjectId("5821af65d2ae67c82154efc5"), "cabinname" : "Kemptner Hütte", "checkin_from" : ISODate("2017-09-05T22:00:00Z"), "reserve_to" : ISODate("2018-01-24T23:00:00Z"), "user" : "57877d23049ac1b819000029", "sleeps" : "2", "clubmember" : "0", "status" : "1", "total_price" : "5640", "payon_cabin" : "5630", "bed_prefer" : "0", "guests" : "2", "comments" : "", "prepayment_amount" : "21.25", "bookingdate" : ISODate("2016-11-08T10:56:37Z"), "reservation_cancel" : "2", "is_delete" : NumberLong(1) } 
{ "_id" : ObjectId("582558d4d2ae679c4d8b4567"), "cabinname" : "2", "checkin_from" : ISODate("2017-07-31T22:00:00Z"), "reserve_to" : ISODate("2017-08-02T22:00:00Z"), "user" : "57877d23049ac1b819000029", "beds" : "", "dormitory" : "", "sleeps" : "2", "clubmember" : "0", "status" : "", "total_price" : "80", "payon_cabin" : "60", "halfboard" : "", "bed_prefer" : "0", "guests" : "2", "prepayment_amount" : "20", "bookingdate" : ISODate("2016-11-11T05:36:20Z"), "is_delete" : NumberLong(1) } 
{ "_id" : ObjectId("58352c3cd2ae672341ec89e1"), "cabinname" : "Kemptner Hütte", "checkin_from" : ISODate("2017-05-31T22:00:00Z"), "reserve_to" : ISODate("2017-06-02T22:00:00Z"), "user" : "", "beds" : "", "dormitory" : "", "sleeps" : "2", "clubmember" : "0", "status" : "", "total_price" : "80", "payon_cabin" : "60", "halfboard" : "", "bed_prefer" : "0", "guests" : "2", "prepayment_amount" : "20", "bookingdate" : ISODate("2016-11-23T05:42:20Z"), "reservation_cancel" : "2", "is_delete" : NumberLong(1) } 

Answer 1

試試這個：

db.booking.find({user: {$exists:true}}).forEach(function(x) { 
    x.user = new ObjectId(x.user); 
    db.booking.save(x); 
}); 

但是，你user值必須是唯一的十六進制字符串要不然這將失敗。