Validation with ScriptRunner

[Thais de Sousa Lima]

Hi guys,
Is it possible to block a transition if there is another issue in a different project with the status In Progress?
The situation:
I need to block users from moving issues if there is any issue in another project without an assignee.

[Evgenii]

Hi, @Thais de Sousa Lima 

Can you add some more details?
How you want to define, what issue is blocker?
It's some linked item?

Without it it's difficult to answer, how to implement it.

Best regards,
Evgenii

[Thais de Sousa Lima]

Hi @Evgenii ,

Example:
Block the status transition of any issue in Project = Apple if there is any issue in Project = Ball where customfield_123 = Apple and status = In Progress.

[Evgenii]

Got it.

Unfortunately, its not possible. 

This is because Workflow validators use the Jira Expression framework provided by Atlassian, and the Jira Expression Framework does not provide any way to use JQL in an expression.

It was discussed in similar post
https://community.atlassian.com/forums/Jira-questions/Use-JQL-query-and-validate-the-count-returned-by-the-using-jira/qaq-p/2614228

You can validate by linked issues, but not by JQL.
Example of validators:
https://docs.adaptavist.com/sr4jc/latest/features/workflow-extensions/example-conditions-and-validators