Get list of distinct assignees from a filter results using groovy

[Lokesh]

We need to get list of distinct assignees from a filter results, using groovy or rest query.

Any ideas much appreciated. Thanks.

[Lokesh]

Below script returns distinct assignees but twice. And there maybe better version to this,

import com.atlassian.jira.bc.issue.search.SearchService
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.web.bean.PagerFilter
import org.apache.log4j.Level
import org.apache.log4j.Logger

def appUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()
def linkManager = ComponentAccessor.getIssueLinkManager()
def searchService = ComponentAccessor.getComponent(SearchService.class)
def issueManager = ComponentAccessor.getIssueManager()
//def log = Logger.getLogger("Jira Log")
log.setLevel(Level.DEBUG)

def jqlSearch = "project = XYZ AND issuetype = 'Request' AND assignee in (membersOf(XYZ_Users)) AND status not in (Closed, Cancelled) AND updatedDate <= -7D"

SearchService.ParseResult parseResult = searchService.parseQuery(appUser, jqlSearch)
if (parseResult.isValid()) {
def searchResult = searchService.search(appUser, parseResult.getQuery(), PagerFilter.getUnlimitedFilter())
def issues = searchResult.results.collect {issueManager.getIssueObject(it.id)}
issues.assignee.unique().each { issue ->

   }
 }
else{
log.error("Invalid JQL :" + jqlSearch)
}