Store Comment Document For Free

You can use the $comment with any expression taking a query predicate, such as the query predicate in db. collection. updateOne() or in the $match stage of the aggregation pipeline. For an example, see Attach a Comment to an Aggregation Expression.

How to store comments in NoSQL (MongoDB)? 1 way. Comments are embedded in Post document: { "_id": ObjectId(12345), "title": "Cat ate elephant!", "body": "Lorem ipsum dolor sit amet, consectetur adipiscing elit. ... 2 way. Relationship between Post and Comments (in separate documents). ... 3 Answers. Sorted by:

MongoDB's update() and save() methods are used to update document into a collection. The update() method updates the values in the existing document while the save() method replaces the existing document with the document passed in save() method.

MongoDB is built on a scale-out architecture that has become popular with developers of all kinds for developing scalable applications with evolving data schemas. As a document database, MongoDB makes it easy for developers to store structured or unstructured data. It uses a JSON-like format to store documents.

Project Overview. ... Create the Database and Insert a Comment. ... Create the database comment_tracker for the project: ... Insert the first comment: ... MongoDB will respond with a message that the record has been inserted: ... We can view this comment (and all contents of the database) with the command:

If you store each comment in its own document, the documents in your comments collection, would have the following structure: { _id: ObjectId(...), discussion_id: ObjectId(...), slug: '34db', posted: ISODateTime(...), author: { id: ObjectId(...), name: 'Rick' }, text: 'This is so bogus ... ' }