試圖在模型codeigniter中獲取非對象的屬性

Question

我的程序中出現錯誤。在這個程序中，我希望如果periode活動顯示數據，當periode活動但是當periode不活動時不顯示數據任何東西。但我嘗試這個條件，我得到錯誤嘗試獲取模型中的非對象的屬性。

這是模態

function get_id_periode_open() 
    { 
     $this->db->where('tgl_dari <= curdate()'); 
     $this->db->where('tgl_sampai >= curdate()'); 
     // $this->db->where('status', 'open'); 
     $row = $this->db->get('periode')->row(); 
     $id_periode = $row->id_periode; //line error 
     return $id_periode; 
    } 

這是我的控制器

function index($nama = '',$period = 0,$geup = 0) 
    { 
     $this->load->model('mukt'); 
     $id_periode = $this->mukt->get_id_periode_open(); 
     $this->data['id_periode_sekarang'] = $id_periode; 
     if ($id_periode) 
     { 
      $this->data['ukt2'] = $this->mukt->get_ukt($perpage,$offset); 
     } 
     else 
     { 
      echo "string"; 
      $this->data['contents'] = '<div class="twelve wide column">Tidak ada periode aktif</div>'; 
     } 


     if (!$nama AND $this->input->post('nama')) 
     { 
      $nama = $this->input->post('nama'); 
     } 
     else if(!$nama) 
     { 
      $nama = 0; 
     } 

     if ($this->input->post('id_periode')){ 
      $period = $this->input->post('id_periode'); 
     } 
     else if(!$period) 
     { 
      $period = 0; 
     } 

     if ($this->input->post('geup')){ 
      $geup = $this->input->post('geup'); 
     } 
     else if(!$geup) 
     { 
      $geup = 0; 
     }else{ 
      $geup = urldecode($geup); 
     } 
     // echo $period. urldecode($geup). $nama; 
     $count = $this->mukt->get_count_peserta_ukt($period, urldecode($geup), $nama); 
     // print_r($count); 
    // exit; 

     // Set up pagination 
     $offset = 0; 
     $perpage = 1; 
     $uri_segment = 6; 
     if ($count > $perpage) { 
      $this->load->library('pagination'); 
      $this->load->config('pagination'); 

      $config = $this->config->item('pag'); 

      $config['base_url'] = site_url('pelatih/ukt/'.$nama.'/'.$period.'/'.$geup); 
      $config['total_rows'] = $count; 
      $config['per_page'] = $perpage; 
      $config['uri_segment'] = $uri_segment; 
      $config['first_page'] = 'Awal'; 
      $config['last_page'] = 'Akhir'; 
      $config['next_page'] = '&laquo;'; 
      $config['prev_page'] = '&raquo;'; 
      $this->pagination->initialize($config); 
      $this->data['pagination'] = $this->pagination->create_links(); 
      if($this->uri->segment($uri_segment)){ 
       $offset = $this->uri->segment($uri_segment); 
      } 
     } 
     else { 
      $this->data['pagination'] = ''; 
      $offset = 0; 
     } 

     $this->data['periode'] = $this->mperiode->get_periode(); 


     if ($period AND $geup) 
     { 
      $this->data['ukt2'] = $this->mukt->get_cari_peserta_ukt($period, $geup ,$nama,$perpage,$offset); 
     } 
     else if($nama && (!$period || !$this->input->post('geup'))) 
     { 
      $this->data['ukt2'] = $this->mukt->get_cari_peserta_ukt("", "",$nama,$perpage,$offset); 
     } 
     else 
     { 
      $this->data['ukt2'] = $this->mukt->get_ukt($perpage,$offset); 
     } 


     $this->data['title'] ='UKM Taekwondo | ukt'; 
     $this->data['orang'] = $this->mlogin->dataPengguna($this->session->userdata('username')); 
     $this->data['contents'] = $this->load->view('pelatih/ukt/view_ukt', $this->data, true); 
     $this->load->view('template/wrapper/pelatih/wrapper_anggota',$this->data); 

請告訴我如何解決這個錯誤。

謝謝。

Answer 1

可能是您的查詢返回沒有結果，所以儘量做：

$query = $this->db->get('periode'); 
if($query->num_rows() > 0) { 
    $row = $query->row(); 
    $id_periode = $row->id_periode; 
    return $id_periode; 
} 
return 0;