mongodb Questions

MongoDB 5.0.15/4.4.19 start issue after upgrade – CentOS

February 24, 2023
Piotr Gwóźdź
2 Answers

Do anybody manage to start existed relicaset after MongoDB minor version upgrade from official MongoDB stable repo? On previous versions 5.0.14/4.4.18 everything works perfect. {"t":{"$date":"2023-02-24T12:22:59.994+01:00"},"s":"I", "c":"-", "id":4333218, "ctx":"LogicalSessionCacheReap","msg":"Rescheduling the next replica set monitoring request","attr":{"replicaSet":"MainRepSet","host":"10.1.0.4:27017","delayMillis":0}} {"t":{"$date":"2023-02-24T12:22:59.996+01:00"},"s":"I", "c":"REPL", "id":21783, "ctx":"BackgroundSync","msg":"Waiting for pings…

VIEW QUESTION

Mongodb – how to connect mongo db composs into express.js

February 24, 2023
beena n
2 Answers

i am running express.js inside electron and i am trying to connect mongodb composs to expressjs when i start my express.js using electron i am getting error in mongodb i have created the db in mongodb composs here is the…

VIEW QUESTION

I can't delete a data from mongoDb ObjectId class constructor error

February 24, 2023
Sadman Ador
2 Answers

I have written a express index.js to simple crud operation in mongodb. the item is the params I can console.log as mongodb Id however, ObjectId buildin function giving me a an class constructor error that it cannot inboked without 'new'.…

VIEW QUESTION

remove whitespace which are in between String in Mongodb

February 24, 2023
Radhey Yadav
2 Answers

For this document: { "_id" : 3, "name" : " Shyam Lingam " } Expected: while retrieving _id = 3 then result should come like below: { "_id" : 3, "name" : "Shyam Lingam" } I tried this: db.collection.find({_id:3},{name:{$trim:{input:"$name"}}}) {…

VIEW QUESTION

Mongodb – Double array $lookup call preserving original structure

February 24, 2023
borrimorri
2 Answers

I'm trying to populate a double array object but in an aggregate so I am utilizing the $lookup function. The collection looks something like this: { foo: [ { bar: [ { _id: ObjectId('63f508eedd2962118c37ea36') } ] } ] } My…

VIEW QUESTION

MongoDB Aggregation – How can I pad an field with zeros and letters on the left?

February 23, 2023
Patrick Teixeira
2 Answers

Can you help me with a situation... I Have this Json but I would like to format the field trackingID like "TR000000012345BR". How can I pad a trackingId with letters and zeros on the left and letter on the rigth…

VIEW QUESTION

Failed to connect to mongoDb using mongoose and nodejs

February 23, 2023
Mandeep Singh
3 Answers

my app.js file has code : const connectDB = require("./db/connect"); require("dotenv").config() const app = express(); const url = process.env.MONGO_URI; const port = 8080; // listen to server const start =async () =>{ try { await connectDB(url); app.listen(port, () => {…

VIEW QUESTION

Create unique field in MongoDB aggregate when grouping by two fields, and use for sorting

February 22, 2023
Ax0n
3 Answers

When aggregating a collection with the following pipeline stages let ap = [{ $group: { _id: { year: { $year: '$itemDate' }, month: { $month: '$itemDate' }, }, count: { $sum: 1 }, }, }] I receive something like this...…

VIEW QUESTION

Getting a field as null on post request to mongodb database in a spring boot application

February 22, 2023
Mansi Keshari
2 Answers

Here is my document and Employee is a collection in mongoDB database @Document(collection = "Employee") public class Employee { @Id private String id; private String eId; private String firstName; private String lastName; private String emailId; private int grpId; } This…

VIEW QUESTION

Mongodb – I need to get the unique values from the tags field

February 22, 2023
python_beginner
2 Answers

My sample record: [ { "name": "name1", "status": "one", "unit": [ ], "child": [], "element": [ "6604" ], "tags": [ "tag1", "tag2", "tag3" ] }, { "name": "name2", "status": "one", "unit": [ ], "child": [], "element": [ "6604" ], "tags":…

VIEW QUESTION