I have a zipcode input field on a visualforce page. This field could be hidden (rendered = false) based on certain needs. I have the following field validation to ensure a proper zipcode format is entered. If the zip code field is hidden the validation runs when trying to save the record. I need it to not run in this case.
NOT(REGEX( Insured_ZipCode__c , "\\d{5}(-\\d{4})?"))
You need to also check whether it has a value entered in it or not:
NOT(ISBLANK(Insured_ZipCode__c)) && NOT(REGEX( Insured_ZipCode__c , "\\d{5}(-\\d{4})?"))
So if you don't render it, it will be blank and will be ignored by the validation rule, but as soon as you enter a value (you render it), then it must match the regex.
Use AND( NOT(REGEX( Insured_ZipCode__c , "\d{5}(-\d{4})?")), Rendered = TRUE)
