具有連接的Codeigniter活動記錄更新語句

Question

這是我試圖通過活動記錄實現的查詢：

UPDATE `Customer_donations` cd 
join Invoices i on i.cd_id = cd.cd_id 
set cd.amount = '4', cd.amount_verified = '1' 
WHERE i.invoice_id =  '13';

這是我對活動記錄的嘗試：

$data = array('cd.amount'=>$amount, 'cd.amount_verified'=>'1');
$this->db->join('Invoices i', 'i.cd_id = cd.cd_id')
     ->where('i.invoice_id', $invoiceId);


// update the table with the new data
if($this->db->update('Customer_donations cd', $data)) {
  return true;
}

這是實際生成的查詢：

UPDATE `Customer_donations` cd 
SET `cd`.`amount` = '1', `cd`.`amount_verified` = '1' 
WHERE `i`.`invoice_id` =  '13'

為什么這個活動記錄語句沒有應用我的join子句？

Answer 1

下面的解決方案怎么樣？ 有點難看，但它達到了你在你的問題中所期望的。

$invoiceId = 13;
$amount = 4;
$data = array('cd.amount'=>$amount, 'cd.amount_verified'=>'1');

$this->db->where('i.invoice_id', $invoiceId);

$this->db->update('Customer_donations cd join Invoices i on i.cd_id = cd.cd_id', $data);

Answer 2

甚至更干凈，因為更新接受第三個“where”數組參數：

$invoiceId = 13;
$amount = 4;
$data = array('cd.amount'=>$amount, 'cd.amount_verified'=>'1');
$this->db->update('Customer_donations cd join Invoices i on i.cd_id = cd.cd_id', 
  $data, array('i.invoice_id' => $invoiceId));