Appending the update of custom field of type label to already existing value in the field

[Jagadish]

Whenever i try to update my custom field , the old value gets deleted and the new value takes its place . But here i need the new value to be appended to the old one .

I am using ScriptRunner for jira .

[Maksim Smetannikov]

Hi, Jagadish

You need to use the addLabel () method from LabelManager:

https://docs.atlassian.com/software/jira/docs/api/8.4.2/index.html?com/atlassian/jira/issue/label/LabelManager.html

An example can be seen here: https://community.atlassian.com/t5/Jira-questions/How-do-I-add-a-label-as-part-of-the-workflow-transition/qaq-p/245365

[Jagadish]

Hi @Maksim Smetannikov

addLabel() doesnt work . Its asking to check if the method exists .

[Maksim Smetannikov]

Sorry,  Jagadish

I did not notice that the label field is custom. For a custom field of type label, the answer will look like this:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.label.LabelManager
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.event.type.EventDispatchOption


def issueManager = ComponentAccessor.getIssueManager()
MutableIssue issue = issueManager.getIssueObject("MYP-1")

def currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def customLabelFieldID = customFieldManager.getCustomFieldObject("customfield_10100").getIdAsLong()
def labelManager = ComponentAccessor.getComponent(LabelManager)

labelManager.addLabel(currentUser, issue.getId(), customLabelFieldID, "123", false)
ComponentAccessor.getIssueManager().updateIssue(currentUser, issue, EventDispatchOption.ISSUE_UPDATED, false)

[Hubert Rzyha]

If you want to just add label to existing labels on current issue using post function use this. 

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.label.LabelManager
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.event.issue.IssueEvent;
import com.atlassian.jira.event.issue.IssueEventBundle;
import com.atlassian.jira.event.type.EventType;
def issueManager = ComponentAccessor.getIssueManager()
def issueFactory = ComponentAccessor.getIssueFactory()

issueManager = ComponentAccessor.getIssueManager()

def currentUser = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

def labelManager = ComponentAccessor.getComponent(LabelManager.class)

labelManager.addLabel(currentUser, issue.getId(), "LABEL_NAME", false)

It need to be in scirpt runner post function then issue object exist and you use issue.getId()