Question

I am getting the following error when I make an order with a credit/debit card in Magento:

Order saving error: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '282-189' for key 2

I could not get an exact trace, as it just didn’t want to show that to me, however, I have traced it back to app/code/core/Mage/Checkout/controllers/OnepageController.php on line 501 (unedited). The exact line is:

$this->getOnepage()->saveOrder();

Now, logic tells me this is just two orders having the same key when trying to add an order, or am I completely wrong?

Anyway, so outside this, what is the best way to get this fixed? I have thought of exporting the orders, removing them all, and then reimporting them, but I’ve got the feeling it won’t work.

I am using Magento 1.6.2.0

EDIT: I just realized, if I find out which table is failing the integrity check, I could potentially empty that table (depending on which table it is) and this would fix it self? Any ideas on how to find out which table is messing up?

EDIT2: So after Oğuz Çelikdemir’s answer, it turns out the following is the culprit:

2012-03-14T13:59:01+00:00 DEBUG (7): SQL: INSERT INTO `sales_order_tax_item` (`tax_id`, `item_id`, `tax_percent`) VALUES (?, ?, ?) (254, 8, 10)
2012-03-14T13:59:01+00:00 DEBUG (7): SQL: INSERT INTO `sales_order_tax_item` (`tax_id`, `item_id`, `tax_percent`) VALUES (?, ?, ?) (254, 8, 10)

Obviously two of the same tax_id can’t be inserted. Anyone any idea how to fix it?

Answer 1

I found a quick dirty hack. I’ll try and post this as a bug to the developers.
open the file app/code/core/Mmage/Tax/Model/Observer.php and go to line 132.
There’s an if($item) statement, within that statement, wrap the code around this:

$define = 'FIX_'.$item->getId().'_'.$result->getTaxId();
if(!defined($define) || constant($define) != true) {
            // code
    define($define, true);
}

Example:

if (isset($ratesIdQuoteItemId[$id])) {
    foreach ($ratesIdQuoteItemId[$id] as $quoteItemId) {
        if ($quoteItemId['code'] == $tax['code']) {
            $item = $order->getItemByQuoteItemId($quoteItemId['id']);
            if ($item) {
                $define = 'FIX_'.$item->getId().'_'.$result->getTaxId();
                if(!defined($define) || constant($define) != true) {
                    $data = array(
                        'item_id'       => $item->getId(),
                        'tax_id'        => $result->getTaxId(),
                        'tax_percent'   => $quoteItemId['percent']
                    );
                    Mage::getModel('tax/sales_order_tax_item')->setData($data)->save();
                    define($define, true);
                }
            }
        }
    }
}