How can I force jQuery Validate to check for duplicate username in database?

Question

I\'m coming into the middle of this project so I\'m having to do a bit of re-writing because of sloppy code. I am using jQuery 1.6.1 and Validate 1.8.1.

First, here\

Answer 1

While you adding addMethod you should return true or false from server side.

and also that value have to be returned from addMethod.

ie something like this

$.validator.addMethod("checkAvailability",function(value,element){
    var parameter="action=checkusername&username="+username;
    $.ajax({
          url: "dbquery.php",
          type: "POST",
          async: false,
          data: parameter
          success:function(output)
                 {
                    return output
                 }
     });
},"Sorry, this user name is not available");