Mongoose
A Node.js library that gives your app structured models and queries on top of MongoDB.
- Stars
- 27.5k
- Forks
- 4.1k
- Licence
- MIT
- Language
- JavaScript
- Last update
- 4 days ago
- Type
- Library
What it is
Mongoose is an object modeling tool for MongoDB, used from JavaScript and Node.js. You define a schema that describes your documents, including field types, validators, defaults, and indexes, and Mongoose gives you model objects to save, find, and update data in MongoDB. The README says it is designed to work in an asynchronous environment and also mentions alpha Deno support.
- Define a BlogPost schema with typed fields and save new posts to MongoDB
- Run find, findOne, and findById queries against a model
- Add custom validators, setters, getters, and pre-save middleware to a schema
- Connect to a local database with mongoose.connect and an mongodb:// URI
Great for
- Node.js developers building an app backed by MongoDB
- Teams that want schemas, validation, and middleware on top of MongoDB documents
- Projects that need multiple database connections through createConnection
Not ideal for
- People who do not use MongoDB, since the library is specifically for it
- Developers who want a SQL database; the README describes only MongoDB
- Beginners with no Node.js or MongoDB experience, who should learn those basics first
How to get it
- 1
Install with a package manager
You'll need: Node.js · MongoDB
Install with npm
npm install mongoose - 2
Run it
- Install Node.js and MongoDB, then run npm install mongoose in your project
- Call await mongoose.connect('mongodb://127.0.0.1/my_database') to connect
- Define a Schema and create a model with mongoose.model('ModelName', schema)
- Create an instance, call save(), and then query with find or findOne
- 3
Get the most out of it
- Use plugins from the plugins search site at plugins.mongoosejs.io to reuse community features
- Add validators, defaults, and middleware to schemas to keep data consistent
- Use mongoose.createConnection for apps that need more than one database
- Try Mongoose Studio, a browser-based MongoDB GUI that the README says can run as Express middleware
Downloads
Strengths
- Schemas add structure, types, validation, and defaults to MongoDB documents
- Large community with a plugins search site and a documented API at mongoosejs.com
- MIT licensed and actively maintained, with a large contributor base per the README
Trade-offs
- Requires MongoDB running separately; the README asks you to install it first
- Connection and model-scoping rules (connect vs createConnection) are easy to get wrong, as the README's own warning shows
- Major version upgrades can include breaking changes, such as the 9.0.0 release noted in the README
How it compares
| Project | Stars | Type | Level | Updated | Best for |
|---|---|---|---|---|---|
| mongoose (this) | 27.5k | Library | intermediate | 4 days ago | Node.js developers building an app backed by MongoDB |
| typeorm | 36.7k | Library | intermediate | 8 days ago | Node.js or TypeScript developers building apps backed by a relational database |
| gorm | 40k | Library | intermediate | 13 days ago | Go developers building web services or APIs that store data in a relational database |
| sequelize | 30.3k | Library | intermediate | 5 days ago | Node.js backend developers who use a relational SQL database |
| efcore | 14.8k | Library | intermediate | 4 days ago | C# developers building .NET applications that use a relational or document database |
| serviette | 58.7k | App | intermediate | 21 days ago | Teams that want a chat over internal documents without writing code |
Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.