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Can I get a user's full name from their username or user key?


I am writing a Groovy script in Scriptrunner for Jira. I want to get a user's display name (full name). I have both the username and the jira user key (i.e. JIRAUSER00000). I'm finding a lot of articles for how to get the username from the full name, but I want to do the opposite because I want to display a user's name, and I think it looks nicer to display their full name rather than just their username. For some reason, I'm not finding a lot about that online. What's the easiest solution for this?

In case this information helps, I am getting the user from a multi-user picker custom field.

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Nic Brough -Adaptavist-
Community Leader
Community Leader
Community Leaders are connectors, ambassadors, and mentors. On the online community, they serve as thought leaders, product experts, and moderators.
Jan 16, 2023

Depends on what type of user object you have got, but I tend to work with "applicationUser"s.

This is because when you do stuff like 


you get an ApplicationUser object.

If you are working with them, then it's really easy to get a name from that


will fetch what they currently have as their name.

However, ApplicationUser is not the same as the other (several) types of user you can get.  It's usually quite easy to work out an ApplicationUser from most of the other types though.  

Mainly through "userManager" - in your case, you should be able to throw the id into userManager.getUserByKey or .getUserByName or .getUserById.  So, something like

def usersDisplayName = userManager.getUserByKey(JIRAUSER00000).getDisplayName()

Thank you! Seems like, when using issue.getAssigneeUser() or issue.getReporterUser(), adding .getDisplayName() did what I needed.

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