Prevent having the same assignee in two sub-tasks

Use case

Clear the field Assignee when a sub-task has been assigned to the same user for the second time.

You can alternatively set an assignee automatically based on the members of a group.

⚒️ Configuration

Create a new rule and name it appropriately.

Providing a description will help you to identify what the rule does but this step is optional.

Field changed event

Add a Trigger → Field changed event

Fields

Choose Assignee

Changed to

Choose Any value

Boolean condition

Add a Condition → Boolean condition

Expression

Use the following expression:

Bash

%{trigger.issue.issueType} = "Sub-task" and %{trigger.issue.assignee} in fieldValue(%{trigger.issue.assignee}, siblingSubtasks())

Update field action

Add an Action → Update field action

Field

Choose your custom Assignee

Update to

Choose No value - clear field

📤 Import the example

Import the JSON file below to get started in no time.

JSON

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.

JavaScript

{
"name": "Prevent having the same assignee in two sub-tasks",
"description": "Clear the field Assignee when a sub-task has been assigned to the second user for the second time.",
"creator": "admin",
"status": false,
"triggerData": "",
"triggerType": "FIELD_CHANGED_EVENT",
"configuration": {
"refs": [
"issue",
"system",
"trigger.issue",
"trigger.parent"
],
"fieldId": "00003",
"option": "any",
"triggerType": ""
},
"children": [
{
"sequence": 0,
"type": "BOOLEAN_CONDITION",
"ruleEntityType": "CONDITION",
"configuration": {
"refs": [
"issue",
"project",
"system",
"trigger",
"trigger.issue",
"trigger.parent"
],
"expression": "%{trigger.issue.issueType} = \"Sub-task\" and %{trigger.issue.assignee} in fieldValue(%{trigger.issue.assignee}, siblingSubtasks())",
"expressionParsingMode": "logical",
"actingUser": "field_00020"
},
"children": [
{
"sequence": 0,
"type": "UPDATE_FIELD",
"ruleEntityType": "ACTION",
"configuration": {
"refs": [
"issue",
"project",
"system",
"trigger",
"trigger.issue",
"trigger.parent"
],
"fieldId": "00003",
"mode": "clear",
"actingUser": "field_00020"
},
"children": null,
"hasChildren": false
}
],
"hasChildren": true
}
],
"hasChildren": true
}

📚 Related use cases

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