How to make a custom field to be able to select values which are present in issue type hierachy

[Kelvin Teng]

Hi,

Anyone know how to achieve the requirement below?

Thanks.

We have a custom field named Use Case (multiselect field) and we should only able to select the values which are present in the issue type hierachy. 

For example, Epic can only select those selected in Initiative.

For Story, only be able to select those in Epic.

For Sub-tasks, only be able to select those in Parent.

[Alexander Pappert]

not sure if this is possible

some kind of workaround would be with automation or script addons that after issue update you validate the field value and if it is wrong, you could send a mail or something to the assignee.

I would also sort the muslti select list to make it easier for the users which values are allowed for each issue type:

-epic values-
1
2
3
-story values-
1
2
3