When to use this automation rule and when to use a workflow post function?

This use case is very useful if you need to re-assign issues across different projects and issue types.

If you only need to re-assign issues in one dedicated project or issue type context, using the Assign to project role workflow post function might be the better alternative.

Add a Trigger → Issue transitioned event

Add Boolean condition and enter the following Parser Expression*

%{trigger.issue.status} = "Draft"

Add Action → Assign issue

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": "Assign issue to last assignee on transition",
    "description": "",
    "creator": "admin",
    "status": false,
    "triggerData": "",
    "triggerType": "ISSUE_TRANSITIONED_EVENT",
    "configuration": {
        "refs": [
            "issue",
            "system",
            "trigger.issue",
            "trigger.parent"
        ],
        "triggerType": ""
    },
    "children": [
        {
            "sequence": 0,
            "type": "BOOLEAN_CONDITION",
            "ruleEntityType": "CONDITION",
            "configuration": {
                "refs": [
                    "issue",
                    "project",
                    "system",
                    "trigger",
                    "trigger.issue",
                    "trigger.parent"
                ],
                "expression": "%{trigger.issue.status} = \"Draft\"",
                "expressionParsingMode": "logical",
                "actingUser": "field_00020"
            },
            "children": [
                {
                    "sequence": 0,
                    "type": "ASSIGN_ISSUE",
                    "ruleEntityType": "ACTION",
                    "configuration": {
                        "refs": [
                            "issue",
                            "project",
                            "system",
                            "trigger",
                            "trigger.issue",
                            "trigger.parent"
                        ],
                        "assignMode": "projectRole",
                        "projectRole": "10001",
                        "mode": "projectRoleLast",
                        "sendMail": "true",
                        "actingUser": "field_00020"
                    },
                    "children": null,
                    "hasChildren": false
                }
            ],
            "hasChildren": true
        }
    ],
    "hasChildren": true
}