Message: Undefined property: Researchers::$researchers

Code:
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class Researchers extends CI_Controller {



 public function index()

 {

  $this->load->model('researchers');

  $this->load->view('researchers');

 }



    function ahe_page()

    {

  $this->load->view('ahe_page');

 }

 

    function add_researcher()

    {

  $this->load->helper('date'); 





  $data = array(

   'prod_name' => $this->input->post('prod_name'),

   'phase' => $this->input->post('phase'),

   'description' => $this->input->post('description'),

   'main_url' => $this->input->post('main_url'),

   'donation_url' => $this->input->post('donation_url'),

   'last_update' => now(),

   'updated_by' => '',

  );



  

  $this->researchers->add_record($data);

 }

 

 /*

    function show_researchers()

    {

        $data['query'] = $this->researchers->show_record();

        $this->load->view('researchers', $data);

    }

 */

 

}