How to Return Formatted Dates in MongoRepository Using Spring Boot

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How to Return Formatted Dates in MongoRepository Using Spring Boot

When working with data stored in MongoDB, you may find yourself wanting to return dates in a specific format. In this guide, we will tackle a common issue: how to format dates returned from a MongoRepository using the @Aggregation annotation in Spring Boot. If you've ever tried to manipulate date formats and found it challenging, this guide is for you.

The Problem

Imagine you have a field in your MongoDB collection that stores purchase dates as strings, but you need these dates formatted as dd/mm/yyyy HH:mm:ss when queried. The specific question arises:

Is it feasible to return a date converted using an @Aggregation annotation?

This question is often prompted by the desire to maintain a specific date format throughout your application.

The Solution

Yes, it's definitely possible to convert and format dates within an @Aggregation pipeline using $dateFromString. Below, we will break down the solution into clear, organized sections to help you implement this successfully.

Step 1: Update the Aggregation Pipeline

In order to achieve formatted date output, you'll want to update your existing aggregation pipeline. Below is the revised code that includes the $dateFromString operator to convert your date strings.

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

Step 2: Modify the Field Name

In the code above, it’s essential to replace the 'purchaseDate' field in the $dateFromString stage with the appropriate field name from your CartPurchaseMongo class. This field should contain the date string you wish to convert.

Step 3: Test Your Changes

Once you have made the updates to your aggregation pipeline, it's time to test your repository method. Run your application and verify that the dates are returned in the desired format. If everything is set up correctly, you should see dates formatted as dd/mm/yyyy HH:mm:ss in your results.

Conclusion

Formatting dates in MongoRepository can be easily achieved by incorporating the $dateFromString operator within your @Aggregation annotation. By following the steps outlined in this guide, you'll ensure that your application consistently returns dates in the correct format, enhancing both usability and clarity.

If you have any questions or run into issues while implementing this solution, feel free to reach out for assistance. Happy coding!