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Скачать или смотреть How to Use JSONPath to Filter Top Level Keys by Value

  • vlogize
  • 2025-05-25
  • 3
How to Use JSONPath to Filter Top Level Keys by Value
JSONPath filter top level key with certain valuejsonjsonpath
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Описание к видео How to Use JSONPath to Filter Top Level Keys by Value

Discover how to filter top level keys in JSON using `JSONPath`, ensuring you can effectively check for specific values.
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This video is based on the question https://stackoverflow.com/q/72159875/ asked by the user 'Shevach' ( https://stackoverflow.com/u/657576/ ) and on the answer https://stackoverflow.com/a/72159955/ provided by the user 'Tomalak' ( https://stackoverflow.com/u/18771/ ) 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: JSONPath filter top level key with certain value

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.
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Filtering Top Level Keys in JSON with JSONPath

When working with JSON data, it's often necessary to filter out specific key-value pairs based on certain criteria. For instance, you may want to check if a key exists with a particular value and return a corresponding result. In this guide, we will delve into how to use JSONPath to filter a top-level key with a designated value effectively.

Understanding the Problem

Suppose you have the following JSON object:

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

In this case, you need to determine if the key abc equals 10. If it does, your expected output is true; if it doesn't exist or has a different value, the output should be false.

For example:

Given the object above, since abc is indeed 10, your result would be true.

However, if you only had:

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

Here, since abc does not exist, the output should be false.

Using JSONPath for Filtering

To achieve this filtering, you can use a simple JSONPath expression. Let’s explore how to do that in an array of objects.

Imagine you have multiple JSON objects in an array, as shown below:

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

To filter the objects where abc is equal to 10, you would use the following JSONPath query:

JSONPath Query

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

Explanation of the Query

$: Refers to the root element of the JSON data.

[?()]: Denotes a filter expression which allows you to filter based on conditions.

@ .abc == 10: Checks if the value of the key abc is equal to 10.

Results of the Query

Using the query above on the provided array, you would get the following result:

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

Accessing Additional Keys

If you want to access the value of expensive for these filtered results, you can slightly modify the query:

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

This query will return:

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

Conclusion

Filtering JSON by specific key values has never been easier with JSONPath. By using filter expressions, you can ensure that your datasets return only the relevant information you're looking for.

When working with JSON, remember to:

Structure your queries carefully using JSONPath.

Test your queries against different JSON structures to ensure accuracy.

With this guide, you should now feel confident in using JSONPath to filter out key-value pairs effectively!

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