facet classafFormBean::Validate

Place on a method of a FormBean to have it take part in server side validation. Validate methods should be static and take a single FormField parameter. They should inspect the formField.value and set an errMsg if invalid. Example:

class User {
    Str? name

    @Validate { field=#name }
    static Void validateName(FormField formField) {
        if (formField.value == "Trisha")
            formField.errMsg = "Ex-girlfriends not allowed!"
    }
}

If @Validate.field is null then the first parameter should be FormBean:

@Validate
static Void validateBean(FormBean formBean) { ... }

FormBean validation is performed after FormField validation.

Note that validation methods are called using IoC, so services may be passed in as extra parameters:

@Validate
static Void validateName(FormField formField, MyService service) { ... }