Create Listener that Links 2 Issues when Custom Field Changed

Stephen Higgins_i56eig

Our Current Scenario:

1. Scripted Single Issue Picker Field: "Client Project Category Name"
   1. This field resides on all issues within a project and provides a search of all active Client Project Category type issues within that project. 
2. We need to create a "child of" link between the current issue and what ever issue the user selected from the "Client Project Category Name" custom field. 

This field can be updated at any time and is not tied to a workflow as a result. 

We looked at behaviors, but it appears that listeners may be the best place to do this. I am new to groovy and unsure of what to place into our script to create a child link between 2 issues when that custom field is changed. 

Any help would be appreciated. 

Alejandro Suárez García

Hi @Stephen Higgins 

I think something like this (untested) should work:

Edit: I got creative and if you don't have much scripting experience it will be easier for you

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.changehistory.ChangeHistoryItem
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.issue.fields.Field
import com.atlassian.jira.issue.link.IssueLinkType
import com.atlassian.jira.issue.link.IssueLinkTypeManager
import com.atlassian.jira.user.ApplicationUser
import com.onresolve.scriptrunner.parameters.annotation.FieldPicker
import com.onresolve.scriptrunner.parameters.annotation.ShortTextInput
import com.onresolve.scriptrunner.parameters.annotation.UserPicker

@FieldPicker(label = "Issue Picker", description = "The Issue Picker field the user is selecting from")
Field issuePicker
@ShortTextInput(label = "LinkType Name", description = "The Link Type name you want to create between the two issues. Eg: Child Of")
String linkTypeName
@UserPicker(label = "Admin User", description = "User that have edit permission in all projects")
ApplicationUser admin

Issue issueFrom = event.getIssue()
CustomField cfIssuePicker = ComponentAccessor.getCustomFieldManager().getCustomFieldObject(issuePicker.getId())

if (cfIssuePicker.getName() in getFieldsChanged()*.getField()) {
    Issue issueTo = cfIssuePicker.getValue(issueFrom) as Issue
    IssueLinkType issueLinkType = ComponentAccessor.getComponent(IssueLinkTypeManager).getIssueLinkTypesByName(linkTypeName)?.first()
if (issueLinkType)
        ComponentAccessor.getIssueLinkManager().createIssueLink(issueFrom.getId(), issueTo.getId(), issueLinkType.getId(), 1L, admin)
}

List<ChangeHistoryItem> getFieldsChanged() {
return ComponentAccessor.getChangeHistoryManager().getAllChangeItems(event.getIssue())?.findAll {
        it?.getChangeGroupId() == event.getChangeLog()?.id
}
}

 Regards