User Picker Field Doesn't Change In Post-Function

[Paul Tiseo]

I have the following code in a post-function, using Scriptrunner (on Jira v8.0.0). For some reason, it won't update the value in line 37, even though the logs show that it does drop into the if block when the field is null, and it does find the ApplicationUser.

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.ModifiedValue
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.user.ApplicationUser

def customFieldManager = ComponentAccessor.getCustomFieldManager()
def userManager = ComponentAccessor.getUserManager()

def managerReviewerField = customFieldManager.getCustomFieldObjectByName("Manager Reviewer")
def manager = issue.getCustomFieldValue(managerReviewerField)
log.error "manager: " + manager

// get the parent value of the "Service - IT" field
def service = issue.getCustomFieldValue(customFieldManager.getCustomFieldObjectByName("Service - IT"))
def serviceString = service.get(null).toString()

// match Service - IT to appropriate manager
ApplicationUser user

// verify if "Manager Reviewer" field was not set; manager should be == null
if(manager == null) {
if(serviceString == "Applications") {
user = userManager.getUserByName("xxx")
}
if(serviceString == "Infrastructure") {
user = userManager.getUserByName("yyy")
}
if(serviceString == "Security") {
user = userManager.getUserByName("zzz")
}
if(user == null) {
user = userManager.getUserByName("xxx")
}
log.error "user: " + user
}
// update "Manager Reviewer" field
managerReviewerField.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(managerReviewerField), user), new DefaultIssueChangeHolder())

manager = issue.getCustomFieldValue(managerReviewerField)
log.error "manager2: " + manager

[Ilya Turov · Accepted solution]

I believe, since it's a postfunction, simple

issue.setCustomFieldValue(managerReviewerField, user) 

should be enough

[Paul Tiseo]

Thanks, that worked.