Codeigniter活动记录中如何从SQL中选择Unicode文本？

Question

I have a very basic, yet important question that I have been struggling with for over 2 hours now.

Question

How to force (N) prefix when selecting from MS-SQL using CodeIgniter active record?

This is my code:

Controller:

$result = $this->users->login($uname, $password);

Model

function login($username = NULL, $password = NULL)
{
    if( !$username || !$password){          
        return FALSE;           
    }

    $this->db->select('CustomerID');
    $query = $this->db->get_where('UsersTbl',array('Username' => $username, 'Password' => $password));

    return $query->row_object();
}

---

Now, I have tried putting "N" before the $username in the model function call like:

array('Username' => 'N\\''.$username, 'Password' => $password)) , which constructs the SQL query as: WHERE Username = 'N'arabicText'

and tried putting the (N) after the field name, like the '<' or '>' trick in the form:

array('Username=N' => $username, 'Password' => $password)) which constructs the SQL query as: WHERE Username =N 'arabicText' --> And for this to work, the (N) must be directly attached to the text, in the form: N'arabicText'

It all seems to fail...any ideas??

Answer 1

Ok, I found the answer.

First:

Change the call in the model to: $query = $this->db->get_where('UsersTbl',array('Username = N' => $username, 'Password' => $password));

Second:

In codeigniter *System/database/DB_active_rec.php* I've changed the way SQL is contructed in line 427 they add space to the value of "where": $v = ' '.$this->escape($v) , Now I had to remove this space so that it becomes: $v = ''.$this->escape($v) or just $v = $this->escape($v)

Now when I check the $sql it self, it's just how I need it to be: SELECT CustomerID FROM UsersTbl WHERE Username = N'جاد' AND Password = '123'

As you can see, the Password field is not affected by the change, because it only applies to the fields with operators =D