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Convert string to objectid in MongoDB?
To convert string to objectid in MongoDB, use $toObjectId. Let us create a collection with documents −
> db.demo95.insertOne({"Id":"5ab9cbe531c2ab715d42129a"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e2d5ef5b8903cdd865577ac")
}Display all documents from a collection with the help of find() method −
> db.demo95.find();
This will produce the following output −
{ "_id" : ObjectId("5e2d5ef5b8903cdd865577ac"), "Id" : "5ab9cbe531c2ab715d42129a" }Following is the query to convert string to objectid in MongoDB −
> db.demo95.aggregate([ { "$addFields": { "d" : { "$toObjectId": "$Id" } }} ])This will produce the following output −
{ "_id" : ObjectId("5e2d5ef5b8903cdd865577ac"), "Id" : "5ab9cbe531c2ab715d42129a", "d" : ObjectId("5ab9cbe531c2ab715d42129a") }
Updated on: 30-Mar-2020
3K+ Views
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