PU - Using validators

Additional validators and conditions enable you to perform checks in Jira based on a certain criteria:

Workflow validators

Workflow function	Description	Parameters
Regex Validator	Checks that input value to a custom field satisfies the Regex expression. Configuration: You must specify the custom field and Regex. The custom field values will be matched by the Regex. Optionally, you can also specify a custom error message.	You can check that story points are integer.
Unique Field Value Validator	Checks how many different values exist for a certain field in the ticket. Configuration You must specify JQL in which the result field values of issues will be compared Field the values for which will be compared Maximum allowed non-unique values of the field in a JQL result Alternative error message.
JQL Validator	Checks the count of issues in a JQL result. Configuration JQL – use %THIS% to point to a current issue key Number of issues which should be the same as a number in a result JQL You can also set an alternative error message if a comment is not provided. JQL - use %SUMMARY% to point to the current issue summary. For example: project = "TEST" and Summary ~ "%SUMMARY%" You can check that there is already an issue with the same summary.
Comment Validator	This validator requires a transition comment for all users except those specified in the exception group(s). Configuration You can specify the user groups that can skip providing a comment. You can also set an alternative error message if a comment is not provided. 18417006
Links Validator	This validator checks that there are no linked issues in set statuses. Configuration You must specify the project, issue type and link type. Also, you can select different issue states.
Singular Status Validator	This validator checks that there are no issues in a status. Configuration You must specify the Issue type id and Status id. You may find IDs if you go Administration → Issues → Issue Type/Statuses → hover to Edit → a modal pops up.

Example for a Comment Validator

Let's see how using this validator you can require all users except of the 'jira-developers' group to comment on a ticket when they transition it

Go to Jira Administration > Issues > Workflows.
Click Edit for a project where you want to add a validator.
Select the Diagram view.
Select the transition where you want to add a validator, the configuration panel appears.
Select the Validators tab and click Add validator.
Select the Comment Validator option and click Add.
Define validator parameters:
- (Optionally) Select group(s) that should be able to skip the comment while transitioning tickets
- Specify an alternative message to show to the users in order to prompt them to comment on a ticket during a transition.
Click Update.
To save changes, click Publish Draft.
In the dialog that appears, select whether you'd like to backup project copy, and click Publish.
That's it. Now, while making a ticket transition if you are not in 'jira-developers' you are required to comment every time that you are transitioning a ticket.