set child.id based on parrentid in Cascading Select List with Behaviour

[DKB Service GmbH]

Hey guys,
I'm not really a developer, but I have a requirement for a create issue screen that I would like to implement.
Unfortunately I could not find anything suitable on the www.

in the create issue screen i have a custom field (cascading select list) with the following values.

parentid:
- one time
- Every day
- weekly
- per month

childid:
- Set up archiving
- Task file transfer set up

i want to make some work easier for the user.

if selection parentid:
{"daily or" weekly "or" monthly"}
then childid:
{"Set up task file transfer"}

so the user has a predefined selection of the most frequently occurring value. however, he can change it manually

I hope you can help me 

[DKB Service GmbH]

seems i found a solution:

// Write this behavior on field Archivierungsdauer(Cascading Select List field)

import com.atlassian.jira.component.ComponentAccessor

def crField = getFieldById(getFieldChanged())
def selectedOption = crField.getValue() as String

// det the cascading select field 
def fieldName = "Archivierungsdauer"

//Parent value you want to select (Cascade select list) parent)
def parent1 = "einmalig"
def parent2 = "täglich"
def parent3 = "wöchentlich"
def parent4 = "monatlich"

// child value that you want to select (Cascade select list child)
def child1 = "Archivierung einrichten"
def child2 = "Zusätzlichen FBIA Task Filetransfer einrichten"

//Get Cascade select List field
def field = getFieldByName(fieldName)
def optionsManager = ComponentAccessor.getOptionsManager()
def customField = ComponentAccessor.getCustomFieldManager().getCustomFieldObjectByName(fieldName)
def fieldConfig = customField.getRelevantConfig(getIssueContext())
def options = optionsManager.getOptions(fieldConfig)

// Select the value of form field value (Select list field)

if (selectedOption.contains("einmalig"))
{
//Set einmalig default values
def parentOption = options.find {it.value == parent1}
def childOption = parentOption?.childOptions?.find {it.value == child1}

field.setFormValue([
parentOption.optionId,
childOption.optionId
])

}
else if (selectedOption.contains("täglich")) 
{
//Set täglich default values
def parentOption = options.find {it.value == parent2}
def childOption = parentOption?.childOptions?.find {it.value == child2}

field.setFormValue([
parentOption.optionId,
childOption.optionId
])
}
else if (selectedOption.contains("wöchentlich")) 
{
//Set wöchentlich default values
def parentOption = options.find {it.value == parent3}
def childOption = parentOption?.childOptions?.find {it.value == child2}

field.setFormValue([
parentOption.optionId,
childOption.optionId
])
}
else if (selectedOption.contains("monatlich")) 
{
//Set monatlich default values
def parentOption = options.find {it.value == parent4}
def childOption = parentOption?.childOptions?.find {it.value == child2}

field.setFormValue([
parentOption.optionId,
childOption.optionId
])
}
else {
return
}

 if i start create issue the first lection af a parrent value and autom. set the child value works..

BUT:

if ich change the parrent value to another, both values are changing the value continuously.