Help with counting how many components on a Jira issue

[Inayat Nahvi]

I'm working with Jira 8.5 and the latest Jira Misc Custom Fields plugin release.  So I created a custom calculated field with the following Groovy script:

// Get Component Count
def compcount = issue.get("components").size() as Integer

// Check if Component Count is valid
if (compcount != null){
return compcount
}else{
// return zero to indicate a null value in one of the fields
return "0" 
}

This works correctly when an issue has at least one component.  But if no component is set, it spits out the error below instead of a 0.   I would I guess I am missing something obvious, but I not very familiar with Groovy scripting.

Message:

java.lang.NullPointerException: Cannot invoke method size() on null object

Stack:

org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:91)
org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:43)
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
org.codehaus.groovy.runtime.callsite.NullCallSite.call(NullCallSite.java:34)
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:115)
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:119)
script_ee204201d3efffe787713c4b71f3d589.run(script_ee204201d3efffe787713c4b71f3d589.groovy:2)

[David Fischer · Accepted solution]

Try this formula instead:

issue.get("components")?.size() ?: 0

[Inayat Nahvi]

@David Fischer , yes, that fixed it.  Thanks for the lightning quick response!

[Teja]

@David Fischer 

How can I solve this 

def issueManager = ComponentAccessor.getIssueManager()

//Get the VE
def cf = ComponentAccessor.customFieldManager.getCustomFieldObjectByName("Validating Environments")

//Get the VE value from Database 
def sizeVE = issueManager.getIssueObject(issue.id).getCustomFieldValue(cf) as List

def value1 = sizeVE.size() > 1  //Line:21

the value1 returning null instead of emptylist, when my value is empty on database

java.lang.NullPointerException: Cannot invoke method size() on null object
 at Script1678.run(Script1678.groovy:21)

[David Fischer]

Hi @Teja ,

you don't need all this complicated code. This will do:

issue.get("Validating Environments")?.size() > 1

The question mark will avoid the NPE you were seeing.