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Require the Linkage of Enhancement based on customfield

We have the logic to for the requirement of the linked field to a certain project if it is linked before the transition occurs.  If the linkage is added during the transition the script does not pick up the fact that the link is added to the screen.  Is this possible to add?


import org.apache.log4j.Category
import com.atlassian.jira.ComponentManager
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.project.Project
import com.atlassian.jira.issue.fields.IssueLinksSystemField
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.bc.issue.IssueService
import com.atlassian.jira.bc.issue.IssueService.TransitionValidationResult
import com.atlassian.crowd.embedded.api.User
import com.opensymphony.workflow.InvalidInputException
import com.atlassian.jira.issue.IssueFieldConstants
import com.atlassian.jira.issue.IssueManager
import webwork.action.ActionContext

def issueManager = ComponentAccessor.getIssueManager()
def linkMgr = ComponentAccessor.getIssueLinkManager()
def projectMgr = ComponentAccessor.getProjectManager()

def EK = ComponentAccessor.getCustomFieldManager().getCustomFieldObject("customfield_14803") // External Key
def EKVal = issue?.getCustomFieldValue(EK)

log.debug ("Current issue ID: " + + "--" + EKVal)
log.debug ("Looking for Links...")

def children = 0

//Iterate through the issue's links
for (IssueLink link in linkMgr.getOutwardLinks( {
def issueLinkTypeName =
def linkedIssue = link.getDestinationObject()
def linkProjectName = linkedIssue.getProjectObject().getName()
def linkedIssueKey = linkedIssue.getKey()
def linkedIssueID = linkedIssue.getId()
log.debug ("Inside 4 loop..." + issueLinkTypeName + "--" + linkProjectName)
//look for a link that is child of in PC
if (issue.resolutionObject?.name == "Done" && EKVal != null) {
if (! (issueLinkTypeName == "Parent" && linkProjectName == "Project Central")) {
log.debug ("Not Parent...")
//throw new InvalidInputException("You must link A Child Of issue at this transition")
} else if ((issueLinkTypeName == "Parent" && linkProjectName == "Project Central")) {
log.debug ("Parent...")
children = children + 1
log.debug ("4 Restarting..." + children)
if (children == 0) {
throw new InvalidInputException("You must link A Child Of issue at this transition")
log.debug ("Done...")

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