Summary

As a user, I would like to create an automation that creates subtasks based on a number in a custom field like the one shown in the screenshot below:

Environment

Jira Cloud

Diagnosis

Using the Advanced Branching alone in an automation rule only creates one task

Cause

Jira's native automation capabilities do not directly support looping based on numeric conditions

Solution

Trigger

Use any trigger you want. In this example, we will use a manual trigger

Create lookup table

The purpose of the lookup table (tabCustom) is to map the numeric value of the custom field (Support number, in this case) to nominal values that can be looped over by the automation rule. If the custom field is a number field, add a decimal point like this:

If the custom field is a text field, you don't need to add the decimal point:

Advanced branching

The branch is used by the automation rule to loop over the values of the Lookup Table. To be able to loop over the values, we used a split function to separate the values into individual entities:

{{tabCustom.get(Support Field).split(", ")}}

This is shown in the screenshot below:

Create sub-tasks

Finally, create the subtasks inside the branch and add any fields you want:

Output

The images below show the output after executing the rule

The Audit Log

Created Subtasks: