如何在刪除錯誤時在codeigniter中捕獲數據庫錯誤？

Question

我想定製或處理codeigniter中的查詢錯誤刪除，但問題是它不起作用。 如何使用try catch或else語句處理它？

控制器：

public function delete($id){ 
    $this->load->model('m_customer_info'); 
    $delete=$this->m_customer_info->delete_data($id); 

    $this->get_all_customers(); 
} 

型號：

public function delete_data($id){ 
    $delete="delete from member where idno='$id'"; 

    try{ 
     $this->db->query($delete); 
    } 
    catch(Exception $e) 
    { 
     echo "<script>alert('Cannot delete because it is a club officer')</script>"; 
    } 

    /*if($delete==true){ 
     $this->db->query($delete); 
    } 
    else 
     echo "<script>alert('Cannot delete because it is a club officer')</script>"; 
    */  
} 

Answer 1

在模型

在控制器

public function delete($id) 
{ 
    $this->load->model('m_customer_info'); 
    $delete = $this->m_customer_info->delete_data($id); 
    if ($delete == false) { 
     echo "Delete Failed"; 
    } 
    else{ 
     $this->get_all_customers(); 
    } 

}