How to limit the number of choice in multiple select list ?

Yoann LEGRAND

Hi Community !

Use case  : In Multiple select list, we need to block the creation of issue if the user selected more of 3 values.

We have Scriptrunner, so I think I can to do with a validator at the create like : 

Num = getCustomFieldValue (Myselectlist).size()
If (Num>3) {invalidexception ...etc.... }

But size() seems to be not OK.

Do you have another idea to do that ? with Behaiviour may be ?

 

thanks in advance, 

PD Sheehan

I see no reason why this would not work as a validator.

You may want to protect against zero values being selected. In this case, getCustomFieldValue will be null and size() then definitely won't work.

But have you tried a simple scripted validator implementation so you can leverage the cfValues map

Notice the ? before size(). This will make sure that size won't fail even if the cf value is null.

If you really prefer the full custom validator, then something like this perhaps:

import com.atlassian.jira.component.ComponentAccessor
import com.opensymphony.workflow.InvalidInputException

def myMultiSelect = ComponentAccessor.customFieldManager.getCustomFieldObjectByName("my custom field") 
def numValues = issue.getCustomFieldValue(myMultiSelect).value?.size() ?: 0
if(numValues >3 ){
    throw new InvalidInputException(myMultiSelect.hiddenFieldId, "You may not select more than 3 values")
}