Convert string to ObjectID in MongoDB

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I am developing an API using Codeigniter and MongoDB. In some parts of the database I have saved the ID of an image in ObjectID format instead of a string. Now I got an ID in string format and I need to query the database using it.

How can I "convert" a string to an ObjectID so that I can do the query?

From this:

34234234234234234234

To this:

ObjectID("34234234234234234234")

UPDATE

I found a solution. Just do this new MongoId('34234234234234234234');

http://api.mongodb.org/java/2.6.5/org/bson/types/ObjectId.html

Here, you can see that there is a constructor ObjectId with single String parameter. So, can't it be useful to you ?

Convert string to objectid in MongoDB?, To convert string to objectid in MongoDB, use $toObjectId. Let us create a collection with documents −> db.demo95. To convert string to objectid in MongoDB, use $toObjectId. Let us create a collection with documents −> db.demo95.insertOne({Id:5ab9cbe531c2ab715d42129a})

You just need to require the ObjectId function from your mongo.

ObjectId = require('mongodb').ObjectID;

Then you can use it like that:

ObjectId("34234234234234234234")

$toObjectId (aggregation), type conversion, convert to ObjectId, ObjectId conversion, aggregation. You cannot convert a string value that is not a hexadecimal string of length 24. with ObjectId (nodejs driver doc). When you have a string representing a BSON ObjectId (received from a web request for example), then you need to convert it to an ObjectId instance:

Using mongoose:

var mongoose = require('mongoose');
var objectId = mongoose.Types.ObjectId('569ed8269353e9f4c51617aa');

Using native driver (https://stackoverflow.com/a/21076589/3377073)

var ObjectId = require('mongodb').ObjectId;
doc._id = new ObjectId(doc._id); // wrap in ObjectID

ObjectId, Hexadecimal string value for the new ObjectId. Methods and Attributes¶. ObjectId​() has the following attribute and methods:  oid = ObjectId() oid_str = str(oid) # oid_str is now '555fc7956cda204928c9dbab' From string to ObjectId: oid_str = '555fc7956cda204928c9dbab' oid2 = ObjectId(oid_str) print(repr(oid2)) # ObjectId('555fc7956cda204928c9dbab')

If you are using Meteor

var id = new Mongo.ObjectID("34234234234234234234");

MongoDB string to object Id, The objectId is converted to string. Is there any way to convert string to object id type? 2. Any way to generate an object ID for nested objects? Returns an ObjectId for the hexadecimal string of length 24. You cannot convert a string value that is not a hexadecimal string of length 24. The following table lists some conversion to date examples:

or better use

var mongodb = require(‘mongodb’); //this might have been defined at the beginning of your code.
//now use it
query = {_id:mongodb.ObjectId('569ed8269353e9f4c51617aa')};

and the rest is the same.

How to convert datatype from string to ObjectId, I am trying to convert data type from string to ObjectId. But I am getting error "​invalid object id". forEach@src/mongo/shell/query.js:501:1. For more information on the conversion to double, see Converting to a Double. “string” 2: For more information on the conversion to string, see Converting to a String. “objectId” 7: For more information on the conversion to objectId, see Converting to an ObjectId. “bool” 8

Node.js Mongoose.js string to ObjectId function, To convert Node.js Mongoose.js string to ObjectId function you can do it like ObjectId('4edd40c86762e0fb12000003'); mongoose.mongo. I want to convert ObjectID (Mongodb) to String in JavaScript. When I get a Object form MongoDB. it like as a object has: timestamp, second, inc, machine. I can't convert to string.

ObjectID(), hexString (string) – create a ObjectID from a passed in 24 byte hexstring. Returns​: objectid return the created ObjectID. Examples. Convert a ObjectID into a hex  MongoDB aggregation not allowed to change existing data type of given fields. In this case you should create some programming code to convert string to int.Check below code

ObjectIds in Mongoose, In MongoDB, every document's `_id` property is an ObjectId by default. Mongoose casts 24 char strings to ObjectIds for you based on your schema paths​. automatically convert buffers of length 12 // to ObjectIds. doc = new  Is there a function to turn a string into an objectId in node using mongoose? The schema specifies that something is an ObjectId, but when it is saved from a string, mongo tells me it is still just a string. The _id of the object, for instance, is displayed as objectId("blah").

Comments
  • MongoId is not a valid type in the Mongo REPL
  • This is correct, but just to make it crystal clear, the code you need in the mongo REPL is new ObjectId('34234234234234234234') This worked for me in Robo 3T.
  • this answer really helped!
  • I'm getting: "Error: ReferenceError: require is not defined". What does this mean?
  • ObjectID should be ObjectId when using native driver.