Скачать или смотреть Master Filtering JSON Responses in Postman for API Calls

Learn how to efficiently filter JSON responses in Postman to extract and utilize specific values in your API calls.
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This video is based on the question https://stackoverflow.com/q/71528371/ asked by the user 'Andreas Panteli' ( https://stackoverflow.com/u/11802015/ ) and on the answer https://stackoverflow.com/a/71528699/ provided by the user 'lucas-nguyen-17' ( https://stackoverflow.com/u/7574461/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Master Filtering JSON Responses in Postman for API Calls

If you're new to Postman, navigating JSON responses can be tricky, especially when you're looking to extract specific values from a response for later usage. Today, we will tackle a common scenario: filtering values from a JSON get response using Postman's scripting capabilities.

The Objective

Let's say you receive a JSON response from an API call similar to this:

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

Your goal is to extract the id associated with the original_name "AZURE_BLUE" and store that value in a global variable for future API calls.

Understanding the Problem

When working with JSON data, it's vital to understand the structure of the response and how to access its elements. In your case, the challenge arises from trying to filter through an array of objects within the response.

The Solution

Here's an effective way to achieve your goal using Postman's built-in scripting capabilities. We will utilize the JavaScript functionality to process the JSON response and extract the desired value.

Step-by-Step Breakdown

Parse the JSON Response: Use JSON.parse() to convert the response body into a usable JavaScript object.

Filter the Object: Utilize the find method to look through the array for the object where original_name matches "AZURE_BLUE".

Set the Global Variable: Once you find the desired object, store its id value in a global variable using pm.globals.set().

Here’s the code snippet that accomplishes this:

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

Explanation of the Code

JSON.parse(responseBody): This function converts the string response into a JavaScript array of objects.

.find(({original_name}) => original_name === 'AZURE_BLUE'): This method iterates through the array and returns the first object that has original_name equal to "AZURE_BLUE".

pm.globals.set('id', obj.id): This line saves the id of the found object into a global variable named "id".

Testing the Solution

After implementing the above code in the Tests tab of your Postman request, you can test it by ensuring that the global variable is set as expected. You can verify this by executing another request and referencing the variable (e.g., using {{id}} in your API URL or body).

Conclusion

Filtering JSON responses in Postman is a powerful feature that can enhance your workflow and API interactions. By mastering the use of JavaScript within Postman, you can easily access specific values from complex response structures, making your API testing and development much smoother.

Now you can confidently filter JSON responses to extract values needed for your API calls in Postman. Happy testing!