How to add custom field which says Yes or No if...?

[Sysad]

Hi

I would like to add a scripted custom field with dropdown options Yes & No. I want the scripted field to check for attachment(s) in an issue and set custom field option as yes if there are attachments, else No.

What is the best way? and I have no experience in groovy and accessing attachments.

Any help is appreciated, Thanks 

[Ariel Dor · Accepted solution]

3 years later, I've found a solution to use the utils class within or  without an automation rule - 

class SlaUtils {
    private MutableIssue issue
    private Logger log
    private Object ruleContext
    
    SlaUtils (MutableIssue issue, Logger log, ruleContext=null) {
        this.issue = issue
        this.log = log
        this.ruleContext = ruleContext
    }

then I can either call it either with:

 SlaUtils slaUtils = new SlaUtils(issue, log)

in case I am calling from console without a rule context, or with:

 SlaUtils slaUtils = new SlaUtils(issue, log, ruleContext)

from actual automation rule.