Ruby Forum Ruby on Rails > Validating email

Hi
  I have a mailid like test@123.com@   As part of email validation

 I have to check it user@123.com So I did

"test@123.com@@".split('@')  So I get ['test','123.com']   But if it
were test@123.com  the expected validation is correct But the lase two @
signs are not recognized by split So how can check that after 123.com
still there is @ sign and declare my validation as failed?

Sijo

Sijo Kg wrote:
> Sijo
>   
I can't explain why it doesn't recognize but you could add something to
the end of the address and split.

irb(main):014:0> a = 'test@123.com@@'
=> "test@123.com@@"
irb(main):015:0> a.split('@')
=> ["test", "123.com"]
irb(main):016:0> a = a + 'trash'
=> "test@123.com@@trash"
irb(main):017:0> a.split('@')
=> ["test", "123.com", "", "trash"]
irb(main):018:0>

Hope this helps.

Cheers,
Mohit.
11/7/2008 | 5:29 PM.

Hi
   This is not the required solution Suppose the user enters 
test@123.com@@ or test@123.com@ what happens?  Since we  cant insists 
that there should be value after @  or @@

Thanks
Sijo

On Fri, Nov 7, 2008 at 8:39 PM, Sijo Kg 
<rails-mailing-list@andreas-s.net>
 wrote:

>
> Hi
>   This is not the required solution Suppose the user enters
> test@123.com@@ or test@123.com@ what happens?  Since we  cant insists
> that there should be value after @  or @@


Use tmail to validate your email :)
It will raise an exception on basically anything except a correct 
address.

And I would recommend not using an '@' symbol to symbolize anything in 
an
email address. It is the key component that separates the local from the
domain part of the email address and you will always run into problems.

You can see how here:

http://www.lindsaar.net/2008/4/14/tip-4-detecting-a-valid-email-address

>> require 'tmail'
=> true
>> TMail::Address.parse('test@123.com@@')
TMail::SyntaxError: parse error on token "@"
from parser.y:379:in `on_error'
from (irb):2:in `_racc_yyparse_c'
from parser.y:375:in `scan'
from parser.y:375:in `parse_in'
from racc/parser.rb:152:in `_racc_yyparse_c'
from racc/parser.rb:152:in `__send__'
from racc/parser.rb:152:in `yyparse'
from parser.y:366:in `parse'
from parser.y:344:in `parse'
from 
/Library/Ruby/Gems/1.8/gems/tmail-1.2.3.1/lib/tmail/address.rb:84:in
`parse'
from (irb):2
>> TMail::Address.parse('test@123.com@')
TMail::SyntaxError: parse error on token "@"
from parser.y:379:in `on_error'
from (irb):3:in `_racc_yyparse_c'
from parser.y:375:in `scan'
from parser.y:375:in `parse_in'
from racc/parser.rb:152:in `_racc_yyparse_c'
from racc/parser.rb:152:in `__send__'
from racc/parser.rb:152:in `yyparse'
from parser.y:366:in `parse'
from parser.y:344:in `parse'
from 
/Library/Ruby/Gems/1.8/gems/tmail-1.2.3.1/lib/tmail/address.rb:84:in
`parse'
from (irb):3
>> TMail::Address.parse('test@123.com')
=> #<TMail::Address test@123.com>


--
http://lindsaar.net/
Rails, RSpec and Life blog....

Hi
    Thanks for the reply..But when i tried from script/console reslut 
was like

TMail::Address.parse('test@123.com@')
=> #<TMail::Address test@123.com@>
>> TMail::Address.parse('test@123.com@@')
=> #<TMail::Address test@123.com@>

             Why this happens?

Sijo

On Fri, Nov 7, 2008 at 9:16 PM, Sijo Kg 
<rails-mailing-list@andreas-s.net>wrote:

>    Thanks for the reply..But when i tried from script/console reslut
> was like
>
> TMail::Address.parse('test@123.com@')
> => #<TMail::Address test@123.com@>
> >> TMail::Address.parse('test@123.com@@')
> => #<TMail::Address test@123.com@>
>

What version of TMail is that?

>> TMail::VERSION::STRING
=> "1.2.3"

Mikel

In my current project, I'm using the regexp from
http://www.regular-expressions.info/email.html with validates_format_of 
to
validate email addresses.

Regards,
Craig

Hi

When in console typed
TMail::VERSION::STRING
 I got error

NameError: uninitialized constant TMail

     So wont Tmail be installed as part of Rails?

Sijo

Hey yo -

On 13-Nov-08, at 11:14 PM, Craig Demyanovich wrote:

> In my current project, I'm using the regexp from http://www.regular-expressions.info/email.html 
>  with validates_format_of to validate email addresses.
>
> Regards,
> Craig


Checked out this baby?

http://ex-parrot.com/~pdw/Mail-RFC822-Address.html

(I'm using something similar to Craig's - wonder if the above would
crack open a bug in ruby's regexp?

J

Another contender... I use this one:

http://tfletcher.com/lib/rfc822.rb

usage:  validates_format_of :email, :with => RFC822::EmailAddress