Add items to a collection of records in MongoDB

What is the appropriate operator to utilize for adding a new question to an array of questions? Given the document structure below, which MongoDB operator should be used to insert a new question into the array of questions when chapterId and subchapterId are known in advance?

For instance, I would like to add a new question in subchapterId "1".

  {

    "chapterId": "38",
    "subChapter": [
      {

        "subchapterId": "1",
        "questions": [
          {

            "title": "Either his however modern. Stop central owner color type out. Interview five beyond interesting type suddenly.",

          },
          {

            "title": "Amount himself foreign color moment gun together sit. Deal race range heart despite several. Rather activity eat dinner save mission western. Civil past public enter four then.",

          },
          {

            "title": "Four former operation. Class continue away treatment.\nResponsibility condition dinner realize everything. Sign scene order quality yet. Within sing statement skill popular southern whole."

          },
          {

            "title": "Where of coach nature ask page allow.\nType exist hotel time. Central site policy everyone safe. Official administration family somebody.",

          },
          {

            "title": "Necessary dark these much region. Form sometimes seek. Future according detail piece section.\nNear everything admit. Senior Republican draw as expert market.",

          }
        ]
      },
      {

        "subchapterId": "2",
        "questions": [
          {

            "title": "Audience still use group. Yourself building police. Play imagine serious reality population reach.\nHerself without member must think concern window finish."

          },


          {

            "title": "Rule trip manage still. Imagine religious above race something successful.\nOnce base American series. Low page quite allow. Customer maybe base leave way under blood.",

          },
          {

            "title": "Church audience anyone garden. Federal when individual style.Value billion morning need box whether. Coach traditional cold each us truth.",

          }
        ]
      }
    ]
  }

Answer №1

Feel free to give this a shot

const heading = "presenting the latest inquiry"

db.library.adjust(
  { "needed.theoreticalmodel": "1" },
  { "$expand": { "necessary.details": { heading } }}
)

Answer №2

Utilize the $push function in combination with update to add new records

The following code example pertains to chapterId:38 and subchapterId:1

db.collection_name.update({ "chapterId":"38", "subChapter.subchapterId": "1" }, { $push: { "subChapter.$.questions":{'title':'Newly added record'} }})

Answer №3

To prevent duplicates in an array of objects when updating, employ the $addToSet operator.

db.collectionName.update({        
  "subTopic.subtopicId" :"2"
},{$addToSet:{"subTopic.$.questions":{questionTitle:"Modified Question"}}})

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Storing the result of a PDO array as a PHP variable

Can a PDO result be stored in a PHP variable and used outside of the PDO query? Here is what I am attempting to achieve: The SQL database contains: names: John Peter Allen My code is structured like this: $conn = new PDO("mysql:host=$host;dbname=$db_n ...

Tips for How to Put a Delay on Ajax Requests and Display a Progress Bar During Loading

I am using checkboxes in the sidebar. When a user selects a checkbox from the sidebar, it displays the post normally. Is there a way to add a progress bar to delay the Ajax result? This is my Ajax code: <script> jQuery(document).ready(function($){ ...

What is the process for displaying all indexes of a Mongo Collection using MongoDB Node native?

I am curious about how to retrieve all indexes from a specific collection in mongodb. I've tried using listIndexes, indexes, and indexInformation, but these methods only return empty values (arrays and objects). However, when I run db.getCollection(&a ...

What is the best way to extract all matching data from a database in node.js using a query string?

I'm currently developing a node.js app for booking bus tickets. To support this application, I have established 4 tables: the users table, bus table, booking table, and route table. Here's a snippet of the trip model I've implemented: const ...

Only retrieve links that don't have the specified class by using regular expressions

I am trying to extract all links from an HTML document using REGEX, except for those with a specific class name. For example: <a href="someSite" class="className">qwe</a> <a href="someSite">qwe</a> My goal is to only capture the ...

Manipulate MySQL data in Node.js by storing it in a variable

Struggling to grasp the concepts of nodeJS/typescript and how to effectively save database query results into variables for return. Seeking assistance to solve the problem faced: Here is a method snippet that needs help: public getAllProducts(): ProductA ...

Issue with NodeJS when trying to update data using a 'Post' request

I'm new to NodeJS and I'm currently working on building a basic API for a bookstore. const express = require('express'); const bodyParser = require('body-parser'); const app = express(); const mongoose = require('mongoo ...

How can I activate a disabled option number 2 after selecting option number 1?

I have encountered an issue with my JavaScript code. The second "select" element is supposed to be disabled by default, but I want it to become enabled when an option is selected from the first "select". However, this functionality is not working as expect ...

Retrieve the keys stored within a complex array of objects

I am searching for a function that can transform my data, specifically an array of objects with nested objects. The function should only include keys with immediate string/number/boolean values and exclude keys with object/array values. For example: [ { ...

Tips for updating the css class for multiple DOM elements using jQuery

I am currently attempting to modify the class property of a specific DOM element (in this case, a label tag) using jQuery version 1.10.2. Here is the code snippet I have written: var MyNameSpace = MyNameSpace || {}; MyNameSpace.enableDisableLabels = (f ...

Creating a simple NodeJS application - Handling 404 errors

I'm currently following a tutorial that covers role-based authentication with Passport in Ionic 2. Here is the link to the tutorial: However, I am facing an issue when trying to access the following URLs on my browser: http://localhost:8080/ http: ...

Engage with and rearrange JSON data

Upon receiving data from the endpoint, I realized that it needed some modifications before being suitable for display in a table. The initial example data looks like this: const data = [ { Year: 2017, OriginalIntBalanceOverdue: 0.0, D ...

An effective method for verifying information in MongoDB and generating new records if they are not already present

Is there an efficient way in MongoDB to search for the presence of new data, such as a phone number, and insert it into another collection if it does not already exist? For example, searching whether the phone numbers [123456789, 15, 20] associated with ...

Ways to retrieve multiple outcomes in mongoose and merge them into a unified response

When making an API call in Node.js using Mongoose, I want to execute 3 different queries and then combine the results to create a JSON response. Query student .countDocuments({}) .then(studentNumber => { return studentNumber; }) teacher . ...

What is preventing me from increasing the size of this array?

My code works flawlessly with an array size of 200. However, whenever I try to increase the array size beyond that, a runtime error occurs. What could be causing this runtime error? Could it be due to insufficient memory or something else? Here is the cod ...

Is there a Joomla extension available that can display or conceal content upon clicking?

Looking to enhance my Joomla site by installing a plugin that allows me to toggle the visibility of content with a click, similar to how FAQ sections work on many websites. Question 1 (click here for the answer) { Details for question 1 go here } Questi ...

Tips for altering the appearance of the material-ui slider thumb design when it is in a disabled state

Through the use of withStyles, I have successfully customized the style of the Slider: const CustomSlider = withStyles(theme => ({ disabled: { color: theme.palette.primary.main }, thumb: { height: 24, width: 24, }, }))(Slider); How ...

Are there any alternative approaches to handling frequent database updates in web development aside from using Websockets/AJAX for coding?

Currently, I'm in the process of developing an HTML and Javascript game and looking to implement a feature that displays the player's gold balance on the screen. The goal is to have this balance decrement by 1 every time the player clicks on a sp ...

Is it possible to maintain the Mongo connection throughout multiple requests in Django using pymongo?

I've been working on opening a connection to a mongo cluster deployed in Altas within a Django view. Here is the code snippet I have so far: def homePage(request): context = {} import pymongo client = pymongo.MongoClient(<connection s ...

The file 'index.js' does not have a default export

Stepping into the world of MERN development, I embarked on a journey to construct a learning management system based on an outdated tutorial. To my dismay, I encountered the following error: > ..\server\middlewares\index.js:1 > import ...