MongoDB Stitch Functions - Advanced Serverless Programming

Introduction to MongoDB Stitch Functions

MongoDB Stitch is a serverless platform that allows you to build applications with serverless functions, triggers, and more. In this guide, we'll explore advanced serverless programming with MongoDB Stitch Functions, including creating functions, accessing databases, and sample code to demonstrate their functionality.

1. Creating Stitch Functions

You can create Stitch Functions using JavaScript and use them to perform a wide range of operations. Here's an example of creating a basic Stitch Function:

// Sample Stitch Function to add two numbers
exports = function(a, b) {
    return a + b;
}
    

2. Accessing Databases

MongoDB Stitch Functions can access databases, perform CRUD operations, and more. Here's an example of accessing a MongoDB database within a Stitch Function:

exports = function() {
    const mongodb = context.services.get("mongodb-atlas");
    const items = mongodb.db("mydb").collection("mycollection");
    // Query the database
    return items.find({}).toArray();
}
    

3. Sample Code for Stitch Functions

Here's a sample Stitch Function that demonstrates advanced serverless programming to calculate the average of values in a MongoDB collection:

exports = function() {
    const mongodb = context.services.get("mongodb-atlas");
    const collection = mongodb.db("mydb").collection("mycollection");
    // Calculate the average of a field in the collection
    return collection.aggregate([
        {
            $group: {
                _id: null,
                avgValue: { $avg: "$value" }
            }
        }
    ]).toArray();
}
    

4. Conclusion

MongoDB Stitch Functions provide a powerful serverless programming environment for building serverless applications with MongoDB integration. By creating functions and accessing databases, you can develop advanced serverless applications that scale and respond to changing requirements.