**As** a Begin of the insertionuserEnd of the insertion Begin of the deletion \[enter role of user\]End of the deletion
**I want to** Begin of the insertionadd items from a custom field hierarchy as a value to the work packageEnd of the insertion Begin of the deletion \[enter objective\]End of the deletion
**so that** Begin of the insertionI can select theEnd of the insertion Begin of the deletion \[enterEnd of the deletion desired Begin of the insertionstate for my work package.End of the insertion Begin of the deletion result\]End of the deletion

**Acceptance criteria**

* Begin of the insertion A instance admin must be able to add a custom field of type hierarchy to the form configuration of a work package type.

* A project admin must be able to activate a custom field of type hierarchy inside a project.

* A user must be able to select one (no multi-select) or many (with multi-select) items from the hierarchy to assign them to the work package.


**Trivia**

* Focus is still on work package custom fields.

* Work package view is angular

* we use the ng-select component first (drill down selector is not ready yet)

* we need at least some api access to fetch the needed data

* Does rendering the custom field value impacts heavily the load of the work package? Investigate!End of the insertion