On this page
Use case
When a custom "Number field" is changed in a sub-task, a corresponding field in the parent issue, representing the sum of those field values, will be automatically updated.
The rule executes every time the field is being updated on a sub-task.
Don't want to use an automation rule? Just take a look at our example using calculated number fields and give it a try!
Field changed event
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.
Add a Trigger → Field changed event
Fields*
Choose your custom Number Field
Changed to*
Choose Any value
Issue selector
Add Selector → Issue selector
Target Issue(s)*
Choose Parent Issue
Update field action
Next to the Issue Selector click on Add → Action → Update field
Field*
Choose your custom Number Field
Update to*
Choose Value returned by parsed expression
Parser Expression*
Set the mode to Advanced and enter the following Parser Expression
sum(fieldValue({issue.cf11502}, subtasks()))
#Replace field code with the field code of your custom field. Use the field dropdown to automatically insert the field code
cf11502 is the field code for the custom number field to be summed up. The field code will differ in your instance.
Enable the rule by clicking on the Enable button 
→ 
Screencast
This is how the configuration above should look on your screen
You can get the same result by configuring a Calculated Number Field.
Related use cases
| Use case | Automated action | Use case description | Complexity |
|---|---|---|---|
| Sum up value in parent issue on field change in sub-tasks | Calculate field values from all sub-tasks and writes the sum into a corresponding field in the parent issue. | INTERMEDIATE | |
| Keep the priority of parents and sub-tasks in sync | When the priority of a parent issue is updated, all sub-tasks will be updated accordingly. | BEGINNER | |
| Update assignee and reporter to facilitate user deletion | To facilitate deleting a user account, all issues will be reassigned and the reporter changed to avoid potential problems when deleting the user. | INTERMEDIATE |
If you still have questions, feel free to refer to our support team.
