Customer Requirement

Often times am issue in Jira will have sub-tasks associated with it. An approval or rejection of an issue will also often times be related to the sub-tasks of the issue.

Were all the sub-tasks completed? Are there any missing sub-tasks that should be added to the issue?

It would be handy to have a way to put details from the sub tasks into the email as well so that the user doesn't have to get into Jira and research the issue to decide whether to approve it or not.

Solution

A section in the email template allows you to specify if sub-tasks are shown and then the ability to select which fields from the sub-tasks should be included in the email.

How to implement the setup the e-mail template in order to put details from the sub tasks into the email

Navigate on JIRA ADMINISTRATION → Manage apps → HERZUM APPROVAL
Click the Add E-Mail Templates button or just Edit an existing one
Locale the Sub-Tasks option and click Show

On clicking the Cog Icon and choosing the option Sub Task Fields a screen allows to select the fields to display on the email and establish their order via drag and drop: