Scriptrunner post function: Search for highest number in custom fields and set the next higher numbe

Question

Jira Cloud Script: I got a custom field (text) named "KB Number" readonly field. The field should be filled on a certain workflow transition (post function). I need to get the highest previously used number so far in other issues of the same JIRA project and increase the KB number of the current issue by 1.

Background: The idea is to generate some sort of sequential KB number based on different versions or customfield value .

Example: Version 1 - Script generates New KB Number starts with 1 (eg: 12345)

For version 2 - Script generates New KB Number starts with 2 (eg: 22355)

Shinde_ Mukund · Accepted Answer

Thanks for checking out my community post. I have figured out the Groovy Script for my required. Please let me know If any once else requires assistance on the same matter.