Tag Archives: Mongoose

The Query constructor is used for building the queries. So the user does not need to instantiate a Query directly. The `query` is an instance… Read More
The Query.prototype.count() function is used to count the number of documents in a collection. This functions basically specifies this query as a count query. Syntax: … Read More
Follow these simple steps to learn how to create a login form using Node.js and MongoDB. Login form allows users to login to the website… Read More
The exists() function returns true if at least one document exists in the database that matches the given filter, and false otherwise. Installation of mongoose… Read More
The countDocuments() function is used to count the number of documents that match the filter in a database collection. Installation of mongoose module:  You can… Read More
The where() function is used to create a Query, applies the passed conditions and returns the Query. Installation of mongoose module: You can visit the… Read More
The findByIdAndDelete() function is used to find a matching document, removes it, and passing the found document (if any) to the callback. Installation of mongoose… Read More
The replaceOne() function is same as update() function except MongoDB replace the existing document with the given document (no atomic operators like $set). Installation of… Read More
The findOneAndDelete() function is used to find a matching document, remove it, and passes the found document (if any) to the callback. Installation of mongoose… Read More
Prerequisites: For getting started with this you should have some familiarity with NodeJS, ExpressJS, MongoDB and Mongoose. NodeJS: It is a free open source server… Read More
The findByIdAndUpdate() function is used to find a matching document, updates it according to the update arg, passing any options, and returns the found document… Read More
The findOneAndUpdate() function is used to find a matching document and update it according to the update arg, passing any options, and returns the found… Read More
The findById() function is used to find a single document by its _id field. The _id field is cast based on the Schema before sending… Read More
The findOne() function is used to find one document according to the condition. If multiple documents match the condition, then it returns the first document… Read More
The findOneAndRemove() function is used to find the element according to the condition and then remove the first matched element. Installation of mongoose module: You… Read More