On Create: Validator to confirm if Summary is a duplicate

[Megan D]

Hi,

I want to create a validator script when a reporter tries to create a new issue. It should query the Project and validate that the Summary is unique.

-If it IS unique, then the transition is allowed.

-if it IS NOT unique, add a warning to the Summary field that they need to locate that particular Issue instead.

Can anyone help me with this? I've tried this with no luck, but it's probably very wrong:

def summaryResult= sourceIssue.summary +"New Request"

if (issue.getSummary()== summaryResult){ 
return false 
}