Checking for unique username with Jquery post

Question

So I'm running a script from my page using the Jquery post wrapper, and in chrome debugger the below cases happening:-

1) if the username is taken i'm getting `"taken"` 

2) else it echo's nothing.

However, I cannot get to the alert('im here'); line it seems that if(data=="taken") statement is never run or always evaluating to false, which is not the case. What am I doing wrong?

Jquery

 var flag;
    $.post('welcome/check_username',{childname: $('#name').val()}, function(data){
    if(data=="taken")
            {
                alert('im here');
                 return flag = true;
                  //tell user that the username already exists
                  }else{
                   return flag = false;
                      //username doesn't exist, do what you need to do
                       }
                       });

PHP

if ($this->Form_builder->check_unique_username($username, $childname))
{
     echo "taken";
}

from where You want to check unique username? Jquery / PHP ? — Ripa Saha
– Ripa Saha, Commented Aug 14, 2013 at 8:09
console.log(data) is empty when username is unique otherwise it has "taken" — Undermine2k
– Undermine2k, Commented Aug 14, 2013 at 8:12

DevZer0 · Accepted Answer · 2013-08-14 08:15:52Z

1

its always good to trim things. try

  if(data.trim()=="taken")

answered Aug 14, 2013 at 8:15

DevZer0

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Comments

papkass · Accepted Answer · 2013-08-14 08:12:58Z

1

Try this:

var flag;
var result = $.post('welcome/check_username',{childname: $('#name').val()});
result.done(function( data )
{
    if(data=="taken")
    {
        alert('im here');
        return flag = true;
        //tell user that the username already exists
    }else{
        return flag = false;
        //username doesn't exist, do what you need to do
    }
});

answered Aug 14, 2013 at 8:12

papkass

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Comments

coderkane · Accepted Answer · 2013-08-14 08:22:10Z

1

Looking at the code, here are the sections I would check:

On the PHP side, check whether the function is properly getting the proper values in $username and $password. You can do this by modifying the PHP file like this:

if ($this->Form_builder->check_unique_username($username, $childname))
{
 echo "taken";
}
else
{
  echo $username." and ".$childname." is not taken";
}

Then on the jQuery side, before the if statement, do console.log(data) or alert(data) to see what is being returned. Perhaps, you are sending data by the POST method but the server side script expects the parameters via the GET method.

answered Aug 14, 2013 at 8:22

coderkane

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