I want to fetch data and compare between multi select user fields

[aditya442]

Hi,

I have 3 multi select user field "Approvers" , "Pending Approvers" and "Approved By".

My requirement is - Every time an approver approves, I need to remove the name from Pending Approvers.

This is my code and it gives me error in the last line. I am not sure what did I miss here. can someone help?

import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.MutableIssue
import org.apache.log4j.Category
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder
import com.atlassian.jira.issue.ModifiedValue

def Category log = Category.getInstance("com.onresolve.jira.groovy.PostFunction")
log.setLevel(org.apache.log4j.Level.DEBUG)

def issueManager = ComponentAccessor.getIssueManager()
//def issue = issueManager.getIssueObject("XXX-215")
def issue=Issue

def customFieldManager = ComponentAccessor.getCustomFieldManager()
def approvedBy = customFieldManager.getCustomFieldObject("customfield_10760");
def specApprovers = customFieldManager.getCustomFieldObject("customfield_10607");

log.info("approvedBy"+approvedBy)
log.info("specApprovers"+specApprovers)

//List approvedUsers = approvedBy? (List)issue.getCustomFieldValue(approvedBy) : "Field doesn't exist"
List approvedUsers = (List)issue.getCustomFieldValue(approvedBy)
List approvers = (List)issue.getCustomFieldValue(specApprovers)

def pendingApprover=approvers
if (approvedUsers)
pendingApprover.removeAll(approvedUsers)

log.info("Approvers"+approvers)
log.info("Approvedby"+approvedUsers)
log.info("diff"+pendingApprover)

def changeHolder = new DefaultIssueChangeHolder()
//def finalvalue = customFieldManager.getCustomFieldObjects(issue).find {it.name == "Pending Approvers"}
def finalvalue = customFieldManager.getCustomFieldObjectsByName("Pending Approvers")
finalvalue.updateValue(null, issue, new ModifiedValue(finalvalue, pendingApprover),changeHolder)

Error 

[aditya442]

.