Скачать или смотреть How to Separate Keys and Values in Nested JSON with JOLT

Learn how to transform nested JSON data into separate arrays for keys and values using JOLT transformations. Step-by-step guide included.
---
This video is based on the question https://stackoverflow.com/q/78028395/ asked by the user 'VKB' ( https://stackoverflow.com/u/4249030/ ) and on the answer https://stackoverflow.com/a/78028766/ provided by the user 'Barbaros Özhan' ( https://stackoverflow.com/u/5841306/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Jolt convert keys and values as separate set of arrays

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Introduction

Handling nested JSON data can be a complex task, especially when you need to manipulate it for different formats or outputs. One common problem developers encounter is separating keys and values from a nested JSON object into distinct arrays. In this guide, we will walk you through a sample use case and provide a detailed solution using JOLT transformations.



The Problem

Suppose you have a nested JSON structure that looks like this:

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

You want to transform this input into the following expected output, which separates the keys and values of the ls objects into different arrays:

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



The Solution

The good news is you can achieve this separation using JOLT, a JSON to JSON transformation library. The challenge lies in correctly using the right specifications to restructure the data.

Step-by-Step JOLT Specification

Remove Redundant Nodes: The JOLT spec must account for the complexity of the nested structure. One key means of simplifying the transformation is eliminating redundant nodes that don't aid in structuring your desired output.

Use Array Indexing: To categorize the parameters and values, you can use the array index on the outermost array. This will help organize items into sub-arrays based on their originating position in ms.

Here's the Updated JOLT Spec:

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

Explanation of the JOLT Spec

Operation: Using the shift operation is essential for re-organizing the structure.

Spec:

ms: Refers to the array where the transformation will occur.

The * wildcard matches each item in the ms array.

Elements like ts, ls, and ss are mapped to the expected output structure.

Additional Enhancements

You may also adjust the JOLT spec to include act values in your paramnames and values arrays by extending the logic. Here’s an additional spec for even more comprehensive output:

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

This will include the act parameter in the categorized output.



Conclusion

With the above specifications, you can effectively separate keys and values from a nested JSON object into their respective arrays using JOLT. Mastering this transformation not only helps meet specific data structure needs but also enhances your overall skill in handling JSON manipulations.

Feel free to try out the provided JOLT specs and tailor them as needed for your JSON transformation tasks!