PROBLEM:

• One critical feature/functionality that is missing in JIRA is the ability to define a custom field based on a JQL. This is useful to seamlessly integrate different projects/processes within JIRA.

Example: A select-field (or auto-complete, etc.) that its values are based on the issues from Project X with Status Y (this is defined via a JQL).

SUGGESTION:

• It would be great if this feature becomes native in JIRA.

Workaround:

• The following third party apps provide this feature for Jira on-premise, a valid option would be to contact their support team and verify if they consider providing the same app on the Cloud:
  • JQL Issue Select.
  • Elements Connect - formerly nFeed
  • Query Issues Custom fields (This one is a free app)