How to hide custom fields when Version Picker is empty?

[Diana]

I've used this trick for Behaviours so many times without fail, but for some reason I can't get it to work for a custom field Version Picker (single select).

If any option is selected for Version Picker, another custom field "Text Multi-line" appears.

But if Version Picker is empty, I want the text field to hide. I've tried variations:

def field = getFieldByName("Version Picker")
def fieldValue = field.getValue()
def text = getFieldByName("Text Multi-line")

if (fieldValue != null) {
text.setHidden(false)
}

if (!fieldValue) {
text.setHidden(false)
}

def fieldValue = field.getValue() as String

if (fieldValue != "Unknown") {
text.setHidden(false)
}

But none of them work. If Version Picker is null/Empty, then the text field needs to hide.

(Or in the case of this script logic: If Version Picker IS NOT null/empty (a value was selected), then Text field IS NOT hidden.)

Does anyone know what I'm missing? 

[PD Sheehan · Accepted solution]

I like to use the helptext for debugging behaviours

Add this to your script:

field.setHelpText("$fieldValue (${fieldValue.getClass() - ${(fieldValue instanceof List) ? fieldValue[0].getClass() : ''})")

This will give you some clues as to what kind of data you are dealing with for each situation.

This should show you that when the version field is empty, a empty string value is returned. When one or more version is selected, you get a list of "VersionImpl" objects.

So armed with this information, you should be able to adjust your script accordingly.

def field = getFieldByName("Version Picker")
def fieldValue = field.getValue()
def text = getFieldByName("Text Multi-line")

text.setHidden(!fieldValue || fieldValue.first().name != 'Unknown')

[Diana]

hi @PD Sheehan thank you for the quick response, and the debugging trick is neat!

I added a } between () and - because nothing was showing up at first.

field.setHelpText("$fieldValue (${fieldValue.getClass()} - ${(fieldValue instanceof List) ? fieldValue[0].getClass() : ''})")

I end up going back to the logic "if version picker is empty, then hide text field" and this is what I end up that worked for me

def field = getFieldByName("Version Picker")
def fieldValue = field.getValue()
def text = getFieldByName("Text Multi-line")

text.setHidden(fieldValue.toList().first() == null)

 Thanks again!

[PD Sheehan]

Ah yes, nice catch on my typo.