User Input validation with costum fonction from list

[AmirZair]

I have an "ask question" with a herocard as prompt for text with buttons generated from an imported json file using a function wrote with language generation

[Herocard
title = Country Selection
subtitle = Signature rules
text = What is your Country ?
buttons = ${foreach(GetSignatureData(), item, cardActionTemplate('imBack', item['value']['value'], item.key))}
]

the function looks like this :

#GetSignatureData()
${json(fromFile('./dataSignature.json'))}

The result is stored in dialog.country

I want to allow the user to choose only what proposed in the buttons generated from the heroCard (i'm traversing a json file using keys proposed in the herocard). For that i want to use a Validation rules, but i'm not allowed to put costum fucntion other then what proposed in Adaptive expressions

When trying to to put a validation rule like this one :

${contains((createArray(foreach(GetSignatureData(), item, item.key))), this.value)}

i have this error message :

GetSignatureData() it’s not a built-in function or a custom function.

Thanks in advance teams :)

[a-b-r-o-w-n]

@boydc2014 Does @AmirZair need to add the custom function to the project settings or does that not work for custom functions defined in lg?

[AmirZair]

Thank you @a-b-r-o-w-n for the answer, still waiting for @boydc2014. otherwise, is there a way to catch the exception and considering it as an input validation ? (if exception then ask user to only choose a country from the list below)

[boydc2014]

Sorry for the late response, yes @AmirZair , what you can do is to add those custom functions into settings page to tell composer it's a function that is allowed.

Specifically, the field is customFunctions, and we support wildchar in there, so you can do something like

customFunctions: [
"functionA",
"myfunction.*"
]

[AmirZair]

Thank you for your response @boydc2014, i did add my function "GetSignatureData" to customFunction list, but Composer doesn't seem to evaluate it.

As reminder here is the validation Rule :

=contains((foreach(GetSignatureData(), item, item.key)), this.value)

And the function GetSignatureData() :

#GetSignatureData()
${json(fromFile('./dataSignature.json'))}`

The error given :

Thanks in advance