Dart MongoDB

Introduction to mongo_dart

The mongo_dart package is a Dart library that allows you to interact with MongoDB, a popular NoSQL database. MongoDB stores data in flexible, JSON-like documents, making it ideal for applications requiring dynamic schemas.

This guide will walk you through setting up mongo_dart, performing CRUD operations, and implementing basic queries.

Setting Up mongo_dart

To get started with mongo_dart, you need to add the package to your Dart project. Add the following dependency to your pubspec.yaml file:

Run pub get in your terminal to install the package. Ensure MongoDB is running on your local machine or accessible through a URI.

Connecting to MongoDB

After installation, connect to your MongoDB instance by creating a Db object and opening a connection. Here's an example:

This code demonstrates how to establish and close a connection to a MongoDB database running locally. Replace your_database with your actual database name.

Performing CRUD Operations

CRUD stands for Create, Read, Update, and Delete — the four basic operations for managing data in a database. Here's how you can perform these operations using mongo_dart:

Create Operation

To insert a document into a collection, use the insert method:

This example inserts a new document into the your_collection collection.

Read Operation

To query documents, use the find or findOne methods:

This query retrieves all documents with the name 'John Doe'.

Update Operation

To update existing documents, use the update method:

This updates the age of 'John Doe' to 31 in the collection.

Delete Operation

To remove documents, use the remove method:

This deletes all documents named 'John Doe'.

Conclusion

In this guide, you learned how to set up and use the mongo_dart package for basic CRUD operations in a Dart application. MongoDB's document-based storage can offer flexibility and scalability for your projects.