Create a new rule and name it appropriately.

Add a Trigger

Select Issue event and Issue commented

Add a condition

Select Boolean condition

Expression

Add the following expression to the boolean condition.

%{issue.project.key} = "CASE" and %{issue.issueType} ="Task"

This boolean condition will restrict the range of the automation rule to the desired issues. In this use case we restrict it to the issues in the project CASE with the issue type Task.

Add a selector

Select Issue selector

Target issue(s)

Select Sub-tasks

Add an action

Select the action Add comment

Comment text

Write the following expression.

%{trigger.issue.lastComment}

After importing the JSON file, make sure to check the configuration of the rule. Non-existing configuration elements (issue types, fields, values etc.) will be highlighted.

{
"name": "Copy the parent issue comments to its sub-tasks",
"description": "Copy every new comment added to the parent issue to its sub-tasks.",
"creator": "admin",
"status": false,
"triggerData": "6",
"triggerType": "ISSUE_EVENT",
"configuration": {
"refs": [
"issue",
"system",
"trigger.issue",
"trigger.parent"
],
"triggerType": "6"
},
"children": [
{
"sequence": 0,
"type": "BOOLEAN_CONDITION",
"ruleEntityType": "CONDITION",
"configuration": {
"refs": [
"issue",
"project",
"system",
"trigger",
"trigger.issue",
"trigger.parent"
],
"expression": "%{issue.project.key} = \"CASE\" and %{issue.issueType} =\"Task\"",
"expressionParsingMode": "logical",
"actingUser": "field_00020"
},
"children": [
{
"sequence": 0,
"type": "ISSUE_SELECTOR",
"ruleEntityType": "SELECTOR",
"configuration": {
"refs": [
"issue",
"project",
"system",
"trigger",
"trigger.issue",
"trigger.parent"
],
"option": "subtasks",
"issueListExpressionParsingMode": "issues",
"actingUser": "field_00020"
},
"children": [
{
"sequence": 0,
"type": "ADD_COMMENT",
"ruleEntityType": "ACTION",
"configuration": {
"refs": [
"issue",
"issues",
"project",
"selector.issue",
"selector.parent",
"system",
"trigger",
"trigger.issue",
"trigger.parent"
],
"comment": "%{trigger.issue.lastComment}",
"commentParsingMode": "textBasic",
"actingUser": "field_00020",
"commentVisibility": "everybody",
"sendMail": "true"
},
"children": null,
"hasChildren": false
}
],
"hasChildren": true
}
],
"hasChildren": true
}
],
"hasChildren": true
}