Code igniter : Call to a member function num_rows() on a non-object

Question

i have developed a app in codeigniter on localhost ...the app works fine .. then i uploaded the app into temporary server ... and after login into the admin panel i am getting this error..but if i run the same app in localhost it works fine ...

error

  Fatal error: Call to a member function num_rows() on a non-object in  /home/u520606051/public_html/application/models/loginmodel.php on line 9

this my Model :

function validate($data)
{
    $query = $this->db->get_where('users', $data);
    if($query->num_rows() == 1)
    {
        return true;
    }
}

controller

function verifyUser()
{
    //getting parameters from view 
    $data = array(
            'username' => $this->input->post('username'),
            'password' => $this->input->post('password')
        );      
    $this->load->model('loginModel'); 
    $query = $this->loginModel->validate($data);

    if ($query)
    {
        //if the user c validated
        //data variable is created becx we want to put username in session
        $data = array(
                'username' => $this->input->post('username'),
                'is_logged_in' => true  
            );

        $this->session->set_userdata($data);
        redirect('sessionController/dashboard_area');
    }
    else
    {
        $this->index();
    }
    }

file name Of Modal:

  loginmodel.php

 class Loginmodel extends CI_Model 

file name of Controller

loginController.php

 class LoginController extends CI_Controller 

Answer 1

well i came up a solution by myself ..actually it was not loading the database and thus when i want to query and selecting the result i was getting this error and finally when i checked my databse.php file there is a white space in the name of database so i removed it .. thanks for all of you