Script for removing assignee from user list - Post Function

[Cary Watkins]

I am using a post function to set a list of users for an approval step. As they are internal approvers, I do not want the Assignee to approve the ticket. 

Below is what I have thus far - apologies for the mess, I'm sure there is a better way. Very basic: Approvers field, get the name of the group of approvers from cf10209, finds the people in that group, and applies it to the Approvers field. This currently works, but it is a full list of everyone in that group - I need help figuring out a way to only gather those users not equal to the issue.assignee... 

import com.atlassian.jira.issue.ModifiedValue 
import com.atlassian.jira.issue.MutableIssue 
import com.atlassian.jira.issue.util.DefaultIssueChangeHolder 
import com.atlassian.jira.component.ComponentAccessor 
import com.atlassian.jira.security.roles.ProjectRoleManager 
import com.atlassian.jira.issue.IssueManager  

def customFieldManager = ComponentAccessor.getCustomFieldManager() 
def groupManager = ComponentAccessor.getGroupManager() 
def issueManager = ComponentAccessor.getIssueManager() 
def approversField = customFieldManager.getCustomFieldObjects(issue).find {it.name == "Approvers"} 
def assignedGroupValue = customFieldManager.getCustomFieldObject("customfield_10209").getValue(issue) 
def changeHolder = new DefaultIssueChangeHolder() 
def assignee =issue.getAssignee() 

def usersInGroup = groupManager.getUsersInGroup(assignedGroupValue) 

approversField.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(approversField), usersInGroup),changeHolder)

 Any help would be appreciated... Everything I find online tells about making changes to the actual group. 

[Mark Markov · Accepted solution]

Hello @Cary Watkins

You can filter user like this

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

def customFieldManager = ComponentAccessor.getCustomFieldManager()
def groupManager = ComponentAccessor.getGroupManager()
def approversField = customFieldManager.getCustomFieldObjects(issue).find {it.name == "Approvers"}
def assignedGroupValue = customFieldManager.getCustomFieldObject("customfield_10209").getValue(issue)
def changeHolder = new DefaultIssueChangeHolder()
def assignee =issue.getAssignee()

def usersInGroup = groupManager.getUsersInGroup(assignedGroupValue).findAll {!it.equals(assignee)}

approversField.updateValue(null, issue, new ModifiedValue(issue.getCustomFieldValue(approversField), usersInGroup),changeHolder)

[Cary Watkins]

Great suggesting Mark. Works exactly how I needed it to.