for validation of email field

[ashok]

hi friends, how can i validate email_id field

like 

    public void validatesRecord() {

    validators().validatesPresenceOf("email_id");

    validators().validatesLengthMaximum("email_id", 30);

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    }

    here we are normally use validators().validatesLengthMaximum("email_id", 30); for limitation of lenght in the field but my question is that if user types invalid email_id in email field then what method i need to write for validation of email field i am using varchar(30) datatype for email_id column in my database

[John Chen]

Use validatesIsEmail("email_id");

This method checks if the email value follows Validators.EMAIL_PATTERN.