Скачать или смотреть Converting Complex JSON to Flat JSON using JOLT Transform

Learn how to convert a nested JSON array into a flat JSON object seamlessly using the `JOLT` transformation library.
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Converting Complex JSON to Flat JSON using JOLT Transform

In programming, data formatting and manipulation are crucial for software applications that interact with complex data structures. One common challenge involves parsing nested JSON structures and converting them into a simpler, flat JSON format. This guide will walk you through an efficient solution using the JOLT transformation library.

Understanding the Problem

Let’s consider a scenario where you have JSON data representing a family with multiple members. This data often comes in a nested format, making it cumbersome for applications or APIs that require flat JSON. Here is an example of such an input:

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

Desired Output

Your goal is to transform the above JSON into a flat structure that looks like this:

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

The Solution: JOLT Specification

To convert the nested JSON into a flat format, you can use a JOLT transformation. JOLT is a powerful tool designed for transforming JSON data structures easily. Below, I'll outline the JOLT specification that will accomplish this transformation.

JOLT Spec

Here is the JOLT spec that can be used for the transformation:

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

Explanation of the JOLT Spec

Operation: The "shift" operation is used to map the source JSON keys to the desired destination keys.

Spec: This part defines how to navigate through the nested structure:

"family": Identifies the main array.

"*": A wildcard operator to denote each element inside the array.

Navigating deeper: It drills down to access person, and from there it extracts values nested under personId, employeeAuthCd, etc.

Renaming: The values extracted are then renamed according to your desired output, such as Person_ID for personId.value.

Conclusion

By using the above JOLT spec, you can seamlessly convert a nested JSON array into a flat JSON object. This method not only simplifies data handling but also makes your application more effective in consuming JSON data.

Now, when you're faced with the challenge of parsing complex JSON structures, let JOLT be your go-to tool for quick transformations!

By understanding this specification, you can easily adapt it for similarly structured JSON data, fitting your specific use case. Happy coding!