mongodb Questions

Mongodb – Count posts of user with default value

June 7, 2022
beginner
3 Answers

Supposed I have a data of [ { "_id": "629eb5ced774223d36a68907", "userId": "629eb22698df1015e980a98f", "posts": [ { "_id": "629eb59ad774223d36a688fa", "title": "titletestz", "body": "bodyz", "createdAt": "2022-06-07T02:19:06.314Z", "updatedAt": "2022-06-07T02:19:06.314Z", "__v": 0 }, { "_id": "629eb59ad774223d36a688fc", "title": "titletestx", "body": "bodyx", "createdAt": "2022-06-07T02:19:06.879Z", "updatedAt": "2022-06-07T02:19:06.879Z", "__v":…

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Mongodb – MongoMemoryServer or mongoose in Jest not providing Schema _id

June 7, 2022
Michael Coxon
2 Answers

I am running node version 16.15.0 and have the package.json dependencies: "jest": "^28.1.0", "mongodb-memory-server": "^8.6.0", "mongoose": "^6.3.5", I have a mongoose.Schema set up in a User.js module: import mongoose from 'mongoose' import validator from 'validator' import bcrypt from 'bcryptjs' import…

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Mongodb – TypeError: Cannot read properties of undefined (reading 'host')

June 7, 2022
William
2 Answers

Im keep getting that error while having no idea why. Im trying to connect to my mongodb database but it keeps telling me that "host" is undefined! Here are my files: Index.js const express = require("express"); const dotenv = require("dotenv");…

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How do I update a document in MongoDB using Mongoose

June 6, 2022
Gregzone
2 Answers

I am creating a Car Booking Service. Here is the code for car Model. const mongoose = require('mongoose'); const CarSchema = new mongoose.Schema({ Name: { type: String, required: true }, Model: { type: String, required: true }, Year: { type:…

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install MongoDB on ubuntu 22.04

I am follow this step but not working for ubuntu 22.04. echo "* Installing Mongod..." sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4 echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list sudo apt-get update -y sudo apt-get…

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MongoDB – How to update content to many collections

I have a collection called "Image", below is 1 document of the Image collection: { "_id" : ObjectId("6234342df8afb4001e279ecc"), "is_deleted" : false, "labels" : [ { "_id" : ObjectId("623d687e745109001e09f146"), "labelId" : ObjectId("623d6821745109001e09f04e"), "xmin" : 0.400763358778626, "xmax" : 0.614503816793893, "ymin" : 0.694300518134715,…

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Mongodb – Serving Static file publically in nodejs :- Not Working

June 6, 2022
fzee07
2 Answers

In my nodejs server file, I am trying to server static folder the code goes as below :- server.js const express = require("express"); const app = express(); require("dotenv").config(); const cookieParser = require("cookie-parser"); const bodyParser = require("body-parser"); const { connectDB }…

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mongoDb – How to ensure unique item in an array based on specific fields?

June 5, 2022
nimrod serok
2 Answers

Inspired by another question, suppose I have documents that contain an array of events, where each event has 3 fields: eventName, actorId, and detail: { _id: ObjectId("5a934e000102030405000000"), date: ISODate("2022-06-03T00:00:00.000Z"), events: [ { eventName: "Add", actorId: "1", detail: "new actor" },…

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Mongodb – how does mongo db group by using aggregate?

June 5, 2022
WorldTreeBoy
2 Answers

how attribute does mongodb uses to group by ? do they use only the "_id" or the ( "_id" AND "Total departments") I am slightly confused because "_id" and "Total Departments" are in the same curly bracket $group db.department.aggregate([ {…

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How to find value in array of object in mongodb

June 5, 2022
VebDav
3 Answers

I want to get the value of a nested object within an array. I get the _id of the parent object, as well as the _id of the child object within the array, but I am not able to retrieve…

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