Validate an issue only if a comment is written during the transition

Use case

Evaluate comments and hide transitions based on the outcome.

This use case is only valid for validators as it involves making changes during a transition. An additional error message can be added.

Jira expression*

 originalIssue.comments != issue.comments

The whole set of comments before the transition must be different from the set of comments during the transition.

Do not forget to add a screen to the same transition that contains the validator, otherwise it will always block the transition.

Use case	Workflow function	Complexity
Block a transition based on issue links	Jira expression condition Jira expression validator	ADVANCED
Block a transition based on sprint information	Jira expression condition Jira expression validator	BEGINNER
Block a transition based on the day of the week	Jira expression condition Jira expression validator	BEGINNER
Block a transition if a predefined field value has not been changed	Jira expression condition Jira expression validator Update fields	BEGINNER
Block a transition if some issues under an epic are not in a certain status	Jira expression condition Jira expression validator	INTERMEDIATE
Check current issue status	Jira expression condition Jira expression validator	BEGINNER
Check for unresolved sub-tasks	Jira expression condition Jira expression validator	INTERMEDIATE
Check if an attachment was added recently	Jira expression condition Jira expression validator	BEGINNER
Check parent issue type	Jira expression condition Jira expression validator	INTERMEDIATE
Check the number of times that a field has changed	Jira expression condition Jira expression validator	INTERMEDIATE
Evaluate the Parent Link field	Jira expression condition Jira expression validator	INTERMEDIATE
Evaluate worklogs in sub-tasks	Jira expression condition Jira expression validator	BEGINNER
Validate an issue only if a comment is written during the transition	Jira expression validator	BEGINNER
Validate worklogs	Jira expression condition Jira expression validator

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