Help: Having set_userdata issues

[eluser]fserrano[/eluser]
I'm having problems setting a session value. If I set the session to a string value, when I go to another page in the site it will remember the session value. However, if I set the session value to a query result, it won't store the value at all. Any ideas? Here it is in code:

The following works. It will save the value "MyString" in the session (I'm using database cookie).

Code:

$query = $this->db->get_where('projects',array('nickname'=>$this->uri->segment(4)));
$newid='MyString';
$this->session->set_userdata('currentprojectid',$newid);

But the following won't work. It will not save any value to the session:

Code:

$query = $this->db->get_where('projects',array('nickname'=>$this->uri->segment(4)));
$newid=$query->row()->id;
$this->session->set_userdata('currentprojectid',$newid);