validate an input field in SAP Build Apps.

[YashminBehera]

Hi SAP Community,

I'm currently working on something that involves creating payment options in SAP Build Apps. For the credit card option, I need to ensure that users enter a 12-digit card number. I am looking for a formula that can validate this input field whenever the app is previewed.

Specifically, if the user does not enter a 12-digit number, an alert should be raised with the message: "Please enter a 12-digit number."

I would greatly appreciate any guidance or examples of formulas that can achieve this validation. Thank you in advance for your support!

Best regards, 

Yashmin Behera

SAP Community 

SAP Build Apps 

@Dan_Wroblewski 

@kleventcov 

[Dan_Wroblewski]

Use formula like this:

IF(MATCHES_REGEX("1234567890123a", "^[0-9]{12}$"),"MATCH","BOOOOOOOOOOOO!")

 Obviously, replaces the "123..." string with your variable.

P.S.: Thanks, ChatGPT 😺

[YashminBehera]

Hi @Dan_Wroblewski 

I am still unable to achieve the same.

[Dan_Wroblewski]

The error message explains the issue.

i assume you have an IF flow function, so you just need to return Boolean. You just need the MATCH_REGEX without the IF function

[YashminBehera]

Thank you @Dan_Wroblewski 
Got it.😊