Mongodb return objectId as string

Question

db.getCollection('User').find({
    "userId" : ObjectId("5a141ac4048378xb52c3e5a9"),
        "userRole" : "ADMIN",
        "Id" : "1234567890"})

    result:
    {
        "userId" : ObjectId("5a141ac4048378xb52c3e5a9"),
        "userRole" : "ADMIN",
        "Id" : "1234567890"
    }

    Expecting output:
    {
        "userId" : "5a141ac4048378xb52c3e5a9",
        "userRole" : "ADMIN",
        "Id" : "1234567890"
    }

I am very new to mongodb i nedded to return objectId as String ,i neeed some suggestion to do that.

Clement Amarnath · Accepted Answer · 2018-01-05 13:13:05Z

2

It can be done simply using the below approach

db.User.find({"userId": objectId("5a141ac4048378ab52c3e5a9")}).map(
      function(doc) { 
         return { "userId": doc.userId.str}
      });

Please see ObjectId for more methods

answered Jan 5, 2018 at 13:13

Clement Amarnath

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1 Comment

ederrafo Over a year ago

myDocument._id.str

keyst0rke · Accepted Answer · 2018-01-05 13:04:37Z

0

You can try use a aggregation But ObjectId isn't strings, it's just numbers, why you want present it as string?

answered Jan 5, 2018 at 13:04

keyst0rke

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1 Comment

Clement Amarnath Over a year ago

Aggregation is not needed here, it can be done using simple find query

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