Attempting to hide options in a select list based off of what is selected in another select list

[adimuzio]

I have a list of apps that can be selected in a multi-select field, and based off of those selections I wanted to display relevant fields in a separate multi-select field.  I was following along with the following post: https://community.atlassian.com/t5/Adaptavist-questions/ScriptRunner-Behaviours-change-select-list-based-on-customfield/qaq-p/788924 and made a good amount of progress, however I got stuck towards the end of the thread. Right now, I can see the behaviour attempting to run in my logs, however the functionality isn't working at all. I started receiving this error in my log after adding the very last line to set the fieldOptions to allowedOptions:  

Cannot resolve which method to invoke for [null] due to overlapping prototypes between:
[interface java.lang.Iterable]
[interface java.util.Map]
at Script1.run(Script1.groovy:67)

Worth noting that allowedOptions is evaluating to null, even though I am selecting an option in the affectedApp custom field of the Create Issue screen

Below is my code :

import com.atlassian.jira.ComponentAccessor
import com.onresolve.jira.groovy.user.FieldBehaviours
import com.onresolve.jira.groovy.user.FormField
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.context.IssueContext
import com.atlassian.jira.issue.context.IssueContextImpl
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.CustomFieldManager
import com.atlassian.jira.issue.fields.customfields.*
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.issue.customfields.manager.OptionsManager
import com.atlassian.jira.issue.fields.config.FieldConfigImpl

import groovy.transform.BaseScript

@BaseScript FieldBehaviours fieldBehaviours


def allowedOptions = null
def optionsManager = ComponentAccessor.getOptionsManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def affectedAppField = getFieldByName("OutageAffectedApp")
def affectedAppValue = affectedAppField.getValue()
def affectedFunctionField = getFieldByName("OutageAffectedFunctionality")

def affectedFunctionCF = customFieldManager.getCustomFieldObjectByName("OutageAffectedFunctionality")

def config = affectedFunctionCF.getRelevantConfig(getIssueContext())
def options = optionsManager.getOptions(config)

log.warn("Value set to " + affectedAppValue)
log.warn("Config set to " + config)
log.warn("Options set to " + options)

if (affectedAppValue.toString() == "App1")
{
  allowedOptions = affectedFunctionField.setFieldOptions(options.findAll {
  it.value in ["Option1" , "Option2", "Option3"]
})
}
else if (affectedAppValue.toString() == "App2") 
{
  allowedOptions = affectedFunctionField.setFieldOptions(options.findAll {
  it.value in ["Option4", "Option5", "Option6"]
})
}
else if (affectedAppValue.toString() == "App3")
{
  allowedOptions = affectedFunctionField.setFieldOptions(options.findAll {
  it.value in ["Option7", "Option8", "Option9"]
})
}

log.warn("Allowed Options evaluates to " + allowedOptions)
affectedFunctionField.setFieldOptions(allowedOptions)

[DH]

@adimuzio - I changed your code slightly, does this work?

import com.atlassian.jira.ComponentAccessor
import com.onresolve.jira.groovy.user.FieldBehaviours
import com.onresolve.jira.groovy.user.FormField
import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.context.IssueContext
import com.atlassian.jira.issue.context.IssueContextImpl
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.CustomFieldManager
import com.atlassian.jira.issue.fields.customfields.*
import com.atlassian.jira.issue.fields.CustomField
import com.atlassian.jira.issue.customfields.manager.OptionsManager
import com.atlassian.jira.issue.fields.config.FieldConfigImpl

import groovy.transform.BaseScript

@BaseScript FieldBehaviours fieldBehaviours

java.lang.Iterable allowedOptions = null
def optionsManager = ComponentAccessor.getOptionsManager()
def customFieldManager = ComponentAccessor.getCustomFieldManager()
def affectedAppField = getFieldByName("OutageAffectedApp")
def affectedAppValue = affectedAppField.getValue()
def affectedFunctionField = getFieldByName("OutageAffectedFunctionality")

def affectedFunctionCF = customFieldManager.getCustomFieldObjectByName("OutageAffectedFunctionality")

def config = affectedFunctionCF.getRelevantConfig(getIssueContext())
def options = optionsManager.getOptions(config)

log.warn("Value set to " + affectedAppValue)
log.warn("Config set to " + config)
log.warn("Options set to " + options)

if (affectedAppValue.toString() == "App1")
{
    allowedOptions = options.findAll {
        it.value in ["Option1" , "Option2", "Option3"]
    }
}
else if (affectedAppValue.toString() == "App2")
{
    allowedOptions = options.findAll {
        it.value in ["Option4", "Option5", "Option6"]
    }
}
else if (affectedAppValue.toString() == "App3")
{
    allowedOptions = options.findAll {
        it.value in ["Option7", "Option8", "Option9"]
    }
}

log.warn("Allowed Options evaluates to " + allowedOptions)
affectedFunctionField.setFieldOptions(allowedOptions)