Behaviour script for updating customfield not working

I'm trying to set a custom field list value based on another custom field's value.

In other words, if field1(label) has some labels added to it, set field2's(select list) value to "YES"

Here is my code that throws an exception:

def field1 = issueToUpdate?.getCustomFieldValue(customField1) // field1 is a list object

FieldConfig fieldConfig = customField2.getRelevantConfig(underlyingIssue)

def option = optionsManager.getOptions(fieldConfig).find {it.toString() == "YES"}

FormField field2 = getFieldByName("custom_Field_2")

if (  field1 != null ) {

   log.debug("field1 not empty, updating issue");


    log.debug("updated issue");




In the log:

/rest/com.onresolve.jira.plugin.Behaviours/1.0/behaviours/runvalidator.json [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: null


        at Method)

        at org.codehaus.groovy.reflection.CachedClass$3.initValue(

        at org.codehaus.groovy.reflection.CachedClass$3.initValue(


        at groovy.json.JsonOutput.getObjectProperties(

        at groovy.json.JsonOutput.writeObject(

        at groovy.json.JsonOutput.writeMap(

        at groovy.json.JsonOutput.writeObject(

        at groovy.json.JsonOutput.writeArray(

        at groovy.json.JsonOutput.writeObject(


 Please suggest other ways to set the custom field value

1 answer

1 accepted

1 vote

The problem is you are setting the form value to an Option object, then getting a SO when we try to serialise that. (Which could probably be handled better on our side).

You need to set the form value to the option ID (I think, or the value - probably the ID):


That worked, thanks Jamie.

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