I thought only filters command removes non-digit chars and fild_filters are for forcing digits in a field.

I'll try to write a constraint now. Thanks again.

constraints => { smcsystems => qr/^\d+$/,}

But above is accepting any data - numeric and non-numeric. However if i change code to ->

constraints => { smcsystems => qr/^\d{3}$/,}

It does validate data but then I have to enter 3 digits(that is the max length allowed in my form field). Now I am not sure how I can write reg-ex so that it accepts any number of digits but no alpha chars.