How do I create a post function to auto assign to specific users based on the project?

[Gordon Ngo]

I have multiple projects that use the same workflow.  However, each project has different leads from different groups.  At certain transitions, i would like to auto assign the issue to the relevant lead (Dev, QA, etc.) based on the Project.

[Vasiliy Zverev · Accepted solution]

Replace key1 as project keis and usernames as actual user names.

import com.atlassian.jira.component.ComponentAccessor

switch (issue.getProjectObject().getKey()){
    case "key1": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username1")); break;
    case "key2": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username2")); break;
    case "key3": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username3")); break;
}

This will assing issue to project lead:

issue.setAssigneeId(issue.getProjectObject().getLeadUserKey())

[Gordon Ngo]

When I put that into the custom script field and update the keys/user names, I get errors on the case lines saying:

"Cannot find matching method

com.atlassian.jira.issue.MutableIssue#setAssigneeID(com.atlassian.jira.us (remainder is cut off)

Please check if the declared type is right and if the method exists."

[Vasiliy Zverev]

Here is updated script:

import com.atlassian.jira.component.ComponentAccessor

switch (issue.getProjectObject().getKey()){
    case "key1": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username1").getName()); break;
    case "key2": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username2").getName()); break;
    case "key3": issue.setAssigneeId(ComponentAccessor.getUserManager().getUserByName("username3").getName()); break;
}

[Gordon Ngo]

That worked.  Thank you.