Array To String error / undefined $query

Controller

Code:

 public function existing() // Recieved, Unsolved
 {
     $this->load->database();
     $this->load->model('Docs_model');
     $this->load->library('table');
     $this->data['query'] = $this->Docs_model->viewexisting();

     $this->render('admin/docs/existing_view', $this->data);
 }

PHP Code:

     //...
      $template = 'your_template';
      $this->render('admin/docs/existing_view', $template);