From: Jeffrey Moss <jeff@...>
Date: 2006-01-04T21:25:17+09:00
Subject: Email address validation (was: silly regex question)

I was just perfecting my email address validator, mine allows multiple
email addresses in the email_address field:

validates_format_of :email_address, :with =>
/^\s*(?:(?:[^,@\s]+)@(?:(?:[-a-z0-9]+\.)+[a-z]{2,}\s*(,\s*|\z)))+$/i,
:allow_nil => true

It doesn't do as careful of an inspection as yours, although I've seen
some validations that are far more detailed. It'd be nice to have some
people contribute their suggestions for the ultimate email address
validation regular expression.

I also have this handy method in my class:

  def email_addresses
    self.email_address.split(',').map{|a| a.lstrip.rstrip }
  end

-Jeff

On Wed, Jan 04, 2006 at 08:27:58AM +0900, Dan Kohn wrote:
> Here's a rails example for validating email addresses.
> 
>   validates_format_of :login, :with => /
>     ^[-^!$#%&'*+\/=?`{|}~.\w]+
>     @[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])*
>     (\.[a-zA-Z0-9]([-a-zA-Z0-9]*[a-zA-Z0-9])*)+$/x,
>     :message => "must be a valid email address",
>     :on => :create
> 
>