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Add a Trigger → Field changed event

Add Action → Add Comment

Comment text

Hi [~%{trigger.issue.project.lead}],
the priority on this issue has changed to Blocker. You may want to take a look at this.

Cheers!

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": "Notify project lead on priority change",
    "description": "",
    "creator": "admin",
    "status": false,
    "triggerData": "",
    "triggerType": "FIELD_CHANGED_EVENT",
    "configuration": {
        "refs": [
            "issue",
            "system",
            "trigger.issue",
            "trigger.parent"
        ],
        "fieldId": "00017",
        "option": "fix",
        "fix": "1"
    },
    "children": [
        {
            "sequence": 0,
            "type": "ADD_COMMENT",
            "ruleEntityType": "ACTION",
            "configuration": {
                "refs": [
                    "issue",
                    "project",
                    "system",
                    "trigger",
                    "trigger.issue",
                    "trigger.parent"
                ],
                "comment": "Hi [~%{trigger.issue.project.lead}],\r\nthe priority on this issue has changed to Blocker. You may want to take a look at this.\r\n\r\nCheers!\r\n",
                "commentParsingMode": "textBasic",
                "actingUser": "field_00020",
                "commentVisibility": "everybody",
                "sendMail": "true"
            },
            "children": null,
            "hasChildren": false
        }
    ],
    "hasChildren": true
}