How do I highlight an invalid form field via custom logic in the onchange method?

Question

I am trying to validate a phone field using a custom python library that checks if a given phone number is valid or not. If it is invalid I would like to show the field in red, somewhat like how we see mandatory fields highlighted after we click submit without filling them in. How do I trigger this highlighting of the field?

Haresh Kansara · Answer

Hi Ragav,
if your main goal is to validate field before saving record and raise validation error then you cam put your login into @api.constrains to achieve this.
When user click on save button then @api.constrains will execute and if number not on correct format then raise error.
But if you really want to make field as red like mandatory then you need to do the JS stuff to validate number and and make field border red using JS calculation.
There is an already module to validate number:
https://

Powiązane posty	Odpowiedzi	Widoki
Error while trying to open a form in my module Rozwiązane error form	2 sty 21	4307
Form view fields validation Rozwiązane form validation input	1 lis 23	3568
statusbar does not highlight. [Closed] Rozwiązane form statusbar highlight	4 sie 15	7977
Error while adding grid to a form. error form gridview	0 mar 15	4785
form view server error server error form view	3 mar 15	5185

To pytanie dostało ostrzeżenie

Podoba Ci się ta dyskusja? Dołącz do niej!