Database

In today’s world where AI is gaining too much popularity, suppose, you have created a website to show AI-generated articles on tending topics. These articles are stored in a MongoDB collection named “Articles”. Each document has a field “AI” containing the AI model used for that article generation. Now, to let users filter articles based […]

In our previous tutorial, we learned everything about MongoDB findOneAndUpdate() and findAndModify() methods, but these methods can only update one document at a time and can be suitable for cases like updating a particular post, updating a single user information, etc. In cases where we have to update multiple documents based on some conditions, like

In MongoDB, two popular methods for updating documents are findOneAndUpdate() and findAndModify(). In this article, we will explain both methods, demonstrate them on different datasets, find the differences and discover which one is best suited for your needs. MongoDB findOneAndUpdate() Method MongoDB findOneAndUpdate() method updates the first document that matches the given condition. Even if

The term “is not null” means that there is some value present, except for null. It can be anything, like an empty string, zero, or any other value but not null. The null values are useless in terms of any data they provide. Even if you try to perform any type of statistical operation, these

It’s easy to find documents in a collection in the MongoDB database using methods like find() and findOne(), but when there is a need to find and in the meantime update a document, we have a special method findOneAndUpdate(). This method updates the first document that meets the selection criteria. Let’s learn about it in

In MongoDB, we use arrays to store different types of values ​​like strings, numbers, objects, and even arrays. Now if we want to add a new element to an array present inside the documents, we usually use the $push operator which has a problem. It just adds the value ​​to the array without checking for

If you want to check if a field exists in a collection or filter out documents based on a certain field for either including or excluding them, you can use the $exists operator. Let’s quickly learn about it. MongoDB $exists Operator The $exists operator allows us to check the existence of a field in MongoDB

When handling a large database, we generally use operators like $match and $filter to filter selections. However, MongoDB provides a more powerful operator called $elemMatch that can query arrays and embedded documents. Using $elemMatch, we can match specific conditions within an array or an embedded document, making our queries more precise and easily read. Let’s

Suppose you got the job of managing all the schools in your city. You have created a collection of schools which contains all the school names, locations etc. Also, each school has its own MongoDB collection which includes course names, timings, fees etc.  Now you need to populate each school’s data into your main school

As a MERN fan, we all have a favourite database, MongoDB. While working with it we usually use the find() method to select or query multiple documents, on the other hand, we use findOne() to get one.  We can also use this findOne() with an ID passed as a query to select that specific ID-contained