Скачать или смотреть How to Loop Over a GET Request and Do a POST for Each Key Found in Postman

Learn how to efficiently loop through a GET request response in Postman to create subtasks for each key found. Simplify your workflow with easy-to-follow steps!
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This video is based on the question https://stackoverflow.com/q/67804878/ asked by the user 'Jurgen Woen' ( https://stackoverflow.com/u/16105854/ ) and on the answer https://stackoverflow.com/a/67807172/ provided by the user 'PDHide' ( https://stackoverflow.com/u/6793637/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Loop Over a GET Request and Do a POST for Each Key Found in Postman

If you're exploring the powerful capabilities of Postman for the first time, you might encounter a situation that feels a bit overwhelming. Specifically, you might need to automate the process of creating subtasks from a list of Jira user stories returned by a GET request. This guide will guide you through the steps to loop through the response from the GET request and perform a POST action for each key (issue) returned, effectively streamlining your task management process.

The Challenge

You have made a GET request that returns multiple key values (Jira user stories), and you want to generate a subtask for each key in that list. While the POST request for creating subtasks has already been set up, the challenge lies in how to extract the list of keys from the GET request response and iterate through them to execute the POST request for each one.

Example GET Request Response

Here’s a quick rundown of what a sample GET response might look like:

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

In this response, each issue contains a key that you will use to create subtasks.

Step-by-Step Solution

Now let's delve into the step-by-step process to achieve this automation in Postman.

Step 1: Store Issues in a Variable

First, you'll want to capture the list of issues from your GET request and store it in a variable. This will make it easy to access the issues later when you need to perform your POST requests.

In the Tests tab of your GET request, add the following code:

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

This code stores the issues array of your GET response in an environment variable called issues.

Step 2: Set Up the Pre-request Script for POST Request

Next, navigate to the Pre-request Script section of your POST request where you will create the subtasks. Here, you’ll need to retrieve the issues and prepare each issue for the POST request.

Add the following code in the Pre-request Script:

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

Breakdown of the Code

let array = pm.environment.get("issues"); retrieves the previously stored issues.

let issue = array.pop(); takes the last issue from the array for processing.

pm.environment.set("issues", array); updates the issues variable by removing the last accessed element.

pm.environment.set("id", issue.id); sets the current issue's ID (or key) in another variable to be used in the POST body if necessary.

array.length !== 0 ? postman.setNextRequest(pm.info.requestName) : null; determines if more issues remain; if they do, it triggers the next request (the same POST request) until all keys have been processed.

Conclusion

By following these steps, you can easily loop through the keys returned from a GET request and perform a POST for each one in Postman. This automation not only saves you time but also significantly reduces the likelihood of manual errors when creating subtasks from a list of Jira user stories.

Incorporate this method into your workflow, and you will find it remarkably efficient to manage tasks across your projects!