Hi, Sheetal.
Thank you for contacting us.
That is correct, as for now registration fields doesn't have validation check.
This is something that we should implement in future versions I guess.
Hi, Sheetal.
JomSocial is a community builder extension rather that form builder :)
Fields are used for profiles only.
Validation is enabled for certain, predefined fields like date or email or gender.
I'm afraid that it will be extremely hard to implement field validation unless you implement own profile fields types.
Currently you have fields such as textbox. If you implement validation check for that field you want be able to utilize that field for any other purpose. E.g if you implement PIN validation check to textbox you won't be able use that field to anything else but PIN codes (you don't have option in backend to precise what is field purpose).
But... you may add php condition that if certain title or field code is used then certain validation check is fired.
Field code files are stored here: ROOT/components/com_community/libraries/fields
Please, note that such a customization will be a core hack. Core hacks are not recommended nor supported as they may not working with future JomSocial releases and/or cause issues that won't be not supported. Users with core files hack often refuse to upgrade their installation to keep those hacks and they are stuck with outdated and unsupported versions. Also, core hack will be overwritten during upgrade.
HI, Sheetal.
To be honest - I don't know as this extension doesn't belong to us.
Please, contact extension developers.