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This type of read-only custom field has a value which is dynamically calculated from a custom text expression. It can be used to show a text composed from one or more field values.
You can also create any custom text value depending on the values of other fields in current issue, linked issues, sub-tasks, epics, stories, or any other issue in your Jira instance selected by a JQL query.
Configuration
Parsing Modes
Automatic parsing mode converter: You can write your text in basic mode, and then switch to advanced mode. The text to be parsed will be automatically rewritten as a string expression. Now, you can simply make the modifications you require, making use of text formatting functions or inserting math or time expressions where needed.
Text to be parsed
Example: Calculated Text Field "Components of Sub-tasks"
Create a new Calculated Text Field (by JWT) custom field and name it properly.
Providing a description will help you to identify what the custom field does but this step is optional
Parser expression
Set the parsing mode to Advanced
Add the following expression:
toString(distinct(fieldValue(%{00094}, subtasks())))
Finally, the configuration of the new custom field should look like this:
If you still have questions, feel free to refer to our support team.