How to set due date in jira issue automatically from version field release date?

I have a custom field which allows selecting versions. From the selected version in the field, the release date should be extracted and that should be set as the due date for an issue created . (say newSubTask ). How to do that?

What I did was:

def versionCF = customFieldManager.getCustomFieldObjectByName("Fix Version(s)")

String valueOfversionType = parentIssue.getCustomFieldValue(versionCF)

Project project = parentIssue.getProjectObject()

Version versionn = versionManager.getVersion(project.getId(), valueOfversionType)

newSubTask.setDueDate(new Timestamp(versionn.releaseDate.time))


But I get the following error:

2016-11-23 10:18:10,909 ERROR [workflow.ScriptWorkflowFunction]: *************************************************************************************
2016-11-23 10:18:10,911 ERROR [workflow.ScriptWorkflowFunction]: Script function failed on issue: TPK-129, actionId: 1, file: <inline script>
java.lang.NullPointerException: Cannot invoke method getReleaseDate() on null object


2 answers

Dear @Shagufta Gurmukhdas, Fix versions is not a custom field. It is a build-in field. To get it you should use 


it returns a collection of all Fix Versions.

No, Fix Version/s is the built-in field, but i have created a custom field named Fix Version(s) since I had to make it mandatory in my project and making mandatory the built in field would have made it mandatory for all projects that use it.

So, basically, my field IS a custom field

@Vasiliy Zverev can you help with that? with doing it through a custom field?

  1. It is possible to make Fix version mandatory into field configuration
  2. Namely trouble is that versionn is null. It means that 

    versionManager.getVersion return null

    Here is modified code

    import com.atlassian.jira.component.ComponentAccessor
    import com.atlassian.jira.issue.Issue
    import com.atlassian.jira.issue.fields.CustomField
    import com.atlassian.jira.project.version.Version
    Issue parentIssue = null
    CustomField versionCF = customFieldManager.getCustomFieldObjectByName("Fix Version(s)")
    Version versionn = versionManager.getVersion(
            , parentIssue.getCustomFieldValue(versionCF))
    if(versionn == null)
    newSubTask.setDueDate(new Timestamp(versionn.getReleaseDate().getTime()))


Sorry, I have written versionn.getReleaseDate().time, not versionn.releaseDate.time . But anyway, both aren't working

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