Email Validation in a controller Grails - validation

Question

I'm just trying to validate an email address in a Controller which I thought would be simple. The method I've done is as follows:
def emailValidCheck(String emailAddress) {
EmailValidator emailValidator = EmailValidator.getInstance()
if (!emailAddress.isAllWhitespace() || emailAddress!=null) {
String[] email = emailAddress.replaceAll("//s+","").split(",")
email.each {
if (emailValidator.isValid(it)) {
return true
}else {return false}
}
}
}
This is being used with a sendMail function, which my code for that is here:
def emailTheAttendees(String email) {
def user = lookupPerson()
if (!email.isEmpty()) {
def splitEmails = email.replaceAll("//s+","").split(",")
splitEmails.each {
def String currentEmail = it
sendMail {
to currentEmail
System.out.println("what's in to address:"+ currentEmail)
subject "Your Friend ${user.username} has invited you as a task attendee"
html g.render(template:"/emails/Attendees")
}
}
}
}
This works and sends emails to valid email addresses, but if I put in something random that is not an address just breaks with sendMail exception. I can't understand why it's not validating correctly and even going into the emailTheAttendees() method ... which is being called in the save method.

Answer 1

I would suggest using constraints and a command object to achieve this. Example:
Command Object:
#grails.validation.Validateable
class YourCommand {
String email
String otherStuffYouWantToValidate
static constraints = {
email(blank: false, email: true)
...
}
}
Call it like this in your controller:
class YourController {
def yourAction(YourCommand command) {
if (command.hasErrors()) {
// handle errors
return
}
// work with the command object data
}
}