node.js mongodb select document by _id node-mongodb-native

Question

I\'m trying to select a document by id

I\'ve tried:

collection.update({ \"_id\": { \"$oid\": + theidID } }

collection.update({ \"_id\": theidID }

c         


        

Answer 1

If you use Mongosee, you can simplify the function

FindById:

this replace in mongodb: "_id" : ObjectId("xyadsdd434434343"),

example:

// find adventure by id and execute
Adventure.findById('xyadsdd434434343', function (err, adventure) {});

https://mongoosejs.com/docs/api.html#model_Model.findById

Answer 2

The answer depends upon the variable type you are passing in as the id. I pulled an object id by doing a query and storing my account_id as the ._id attribute. Using this method you simply query using the mongo id.

// begin account-manager.js
var MongoDB   = require('mongodb').Db;
var dbPort      = 27017;
var dbHost      = '127.0.0.1';
var dbName      = 'sample_db';
db = new MongoDB(dbName, new Server(dbHost, dbPort, {auto_reconnect: true}), {w: 1});
var accounts = db.collection('accounts');

exports.getAccountById = function(id, callback)
{ 
  accounts.findOne({_id: id},
    function(e, res) {  
    if (e) {
        callback(e)
    }
    else {
        callback(null, res)
    }

  });
}
// end account-manager.js

// my test file
var AM = require('../app/server/modules/account-manager');

it("should find an account by id", function(done) {

AM.getAllRecords(function(error, allRecords){
  console.log(error,'error')
  if(error === null) {
    console.log(allRecords[0]._id)
    // console.log('error is null',"record one id", allRecords[0]._id)
    AM.getAccountById(          
      allRecords[0]._id,
      function(e,response){
        console.log(response,"response")
        if(response) {
          console.log("testing " + allRecords[0].name + " is equal to " + response.name)
          expect(response.name).toEqual(allRecords[0].name);
          done();    
        } 
      }
    )  
  } 
})

});

Answer 3

var mongo = require('mongodb');
var o_id = new mongo.ObjectID(theidID);
collection.update({'_id': o_id});

Answer 4

I'm using client "mongodb": "^3.6.2" and server version 4.4.1

// where 1 is your document id
const document = await db.collection(collection).findOne({ _id: '1' })
console.log(document)

If you want to copy and paste here's all you need.

const { MongoClient } = require('mongodb')
const uri = '...'
const mongoDb = '...'
const options = {}
;(async () => {
  const client = new MongoClient(uri, options)
  await client.connect()
  const db = client.db(mongoDb)
  const document = await db.collection(collection).findOne({ _id: '1' })
  console.log(document)
)}()

Answer 5

This the approach that worked for me.

var ObjectId = require('mongodb').ObjectID;

var get_by_id = function(id, callback) {
  console.log("find by: "+ id);
  get_collection(function(collection) {
    collection.findOne({"_id": new ObjectId(id)}, function(err, doc) {
       callback(doc);
    });
  });
}

Answer 6

With native_parser:false:

var BSON = require('mongodb').BSONPure;
var o_id = BSON.ObjectID.createFromHexString(theidID);

With native_parser:true:

var BSON = require('mongodb').BSONNative;
var o_id = BSON.ObjectID.createFromHexString(theidID);