Скачать или смотреть Simple Fix for Returning Just the hits Number from DynamoDB using Lambda and API Gateway

Learn how to modify your AWS Lambda function to return only the `hits` number from your DynamoDB table instead of the entire response.
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This video is based on the question https://stackoverflow.com/q/62334709/ asked by the user 'nktanu' ( https://stackoverflow.com/u/13684309/ ) and on the answer https://stackoverflow.com/a/62335143/ provided by the user 'John Rotenstein' ( https://stackoverflow.com/u/174777/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Get Your Lambda Function to Output Just the hits Number from DynamoDB

Working with AWS Lambda and API Gateway can sometimes present challenges, especially when it comes to formatting the response you want. If you've been trying to retrieve just the hits number from a DynamoDB table and felt overwhelmed by the responses you're getting, you're in the right place! In this post, we'll guide you through a simple solution to streamline your output to only show the critical information you need.

The Problem at Hand

Imagine you have a DynamoDB table called hitcounter, where you are tracking the number of hits to a certain path. You have set up an AWS Lambda function to update this counter and retrieve the current hit count. However, you're getting an entire response that includes a lot of extra information, which looks something like this:

[[See Video to Reveal this Text or Code Snippet]]

What you really want is a simplified response that only returns the hits number, like this:

[[See Video to Reveal this Text or Code Snippet]]

The Solution: Modifying Your Lambda Function

You can easily achieve this by making a minor adjustment to your Lambda function. Let's break it down step by step.

Step 1: Update the Lambda Code

In your Lambda function, you will find a line that says:

[[See Video to Reveal this Text or Code Snippet]]

This line is responsible for returning the entire response from DynamoDB. To refine this, you simply need to access the hits value directly from the response object. You need to modify that line to:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Complete Lambda Function Code

Here’s the revised version of your Lambda function with the necessary changes implemented:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Deploy and Test Your Function

Once you've made these changes, deploy your updated Lambda function. You can test it using the AWS Lambda console or by triggering it via your API Gateway. The result should now cleanly show just the hits number in the response body.

Final Thoughts

By modifying just a single line in your AWS Lambda function, you can easily obtain a cleaner and more focused output that aligns with your requirements. This small but significant change will help streamline your API responses and facilitate a better experience for your users.

Are You Ready to Simplify Your Output?

With this guide, you should now be equipped to return only the necessary hits number from your DynamoDB table using AWS Lambda and API Gateway. Happy coding!