錯誤號碼：1054未知列Codeigniter

Question

我有一個代碼從表中檢索鏈接在一起的數據。下面的代碼

public function getdatamentor($key) 
{ 
    $this->db->select('iduser'); 
    $this->db->where('idtraining', $key, false); 
    $hasil= $this->db->get('ttraining'); 
    $this->getNama($hasil->result()); 
} 

public function getNama($key) 
{ 
    $this->db->select('nama'); 
    $this->db->where('iduser', $key, false); 
    $hasil = $this->db->get('tmember'); 
    return $hasil; 
} 

但它返回錯誤

Error Number: 1054 

Unknown column 'TWO00000' in 'where clause' 

SELECT `iduser` FROM `ttraining` WHERE idtraining = TWO00000 

Filename: C:/xampp/htdocs/gofastforex/system/database/DB_driver.php 

Line Number: 691 

感謝您的幫助

Answer 1

試試下面

public function getNama($key) 
{ 
    $this->db->select('nama'); 
    $this->db->where('iduser',"$key"); 
    $hasil = $this->db->get('tmember'); 
    return $hasil; 
} 

Answer 2

由於使用設置在函數的第三個參數false。

$this->db->where('idtraining', $key, false); 

如果設置爲false且值爲字符串，那麼不保護值（Lib不能自動添加單引號）。如果沒有保護，值將被視爲字段名稱。所以你應該刪除或設置true。

$this->db->where('idtraining', $key); 

轉換爲SQL：

SELECT `iduser` FROM `ttraining` WHERE idtraining = TWO00000 # Before remove 
SELECT `iduser` FROM `ttraining` WHERE idtraining = 'TWO00000' # After remove 
                ^ ^
             Lib added single quote to protected. 

Answer 3

在 where方法

第三個參數是逃生

$this->db->where('idtraining', $key, true); // 

更好讀到這裏

https://www.codeigniter.com/userguide3/database/query_builder.html?highlight=where%20cla#CI_DB_query_builder::where