Customization of Power Store 4.5 ...
I thought field validation toward one of Power Store fields is kind of explanation or tutorial to me because there already two fields being treated like that i.e. "product name field" and "price field" are required to be filled field.
And I tried to look for explanation in power store 4.5 documentation about validating field but so far could not find.
I have bought from Web Assist CSS Form Builders and Validation Tool kit 2.0 which I think have relation with Power Store 4.5 validation.
If you can give me a hint, or there is related tutorial about it, I like to learn myself first, before asking for premium support.