Question

I’ve been working on an extension recently. However, I just ran into a snag, and I am wondering if I should reinstall Magento. The problem that I am running into happened yesterday. I believe that I have traced it to the root, but I don’t know how to fix it. When I attempt to submit an order, after the first one has been placed, I get the following error:

There was an error processing your order. Please contact us or try 
again later.exception 'PDOException' with message 'SQLSTATE[23000]: 
Integrity constraint violation: 1062 Duplicate entry '' for key 
'UNQ_INCREMENT_ID'' in 
/Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Statement/Pdo.php:228

Stack trace:
#0 /Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Statement/Pdo.php(228): PDOStatement->execute(Array)
#1 /Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Statement.php(300): Zend_Db_Statement_Pdo->_execute(Array)
#2 /Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Adapter/Abstract.php(479): Zend_Db_Statement->execute(Array)
#3 /Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Adapter/Pdo/Abstract.php(238): Zend_Db_Adapter_Abstract->query('INSERT INTO `sa...', Array)
#4 /Users/jmax/Documents/websites/max_magento/lib/Varien/Db/Adapter/Pdo/Mysql.php(337): Zend_Db_Adapter_Pdo_Abstract->query('INSERT INTO `sa...', Array)
#5 /Users/jmax/Documents/websites/max_magento/lib/Zend/Db/Adapter/Abstract.php(574): Varien_Db_Adapter_Pdo_Mysql->query('INSERT INTO `sa...', Array)
#6 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Model/Mysql4/Abstract.php(414): Zend_Db_Adapter_Abstract->insert('sales_flat_orde...', Array)
#7 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Sales/Model/Mysql4/Order/Abstract.php(417): Mage_Core_Model_Mysql4_Abstract->save(Object(Mage_Sales_Model_Order))
#8 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Model/Abstract.php(318): Mage_Sales_Model_Mysql4_Order_Abstract->save(Object(Mage_Sales_Model_Order))
#9 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Model/Resource/Transaction.php(150): Mage_Core_Model_Abstract->save()
#10 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Sales/Model/Service/Quote.php(183): Mage_Core_Model_Resource_Transaction->save()
#11 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Sales/Model/Service/Quote.php(238): Mage_Sales_Model_Service_Quote->submitOrder()
#12 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Checkout/Model/Type/Onepage.php(745): Mage_Sales_Model_Service_Quote->submitAll()
#13 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Checkout/controllers/OnepageController.php(499): Mage_Checkout_Model_Type_Onepage->saveOrder()
#14 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Controller/Varien/Action.php(420): Mage_Checkout_OnepageController->saveOrderAction()
#15 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(253): Mage_Core_Controller_Varien_Action->dispatch('saveOrder')
#16 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Controller/Varien/Front.php(176): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))
#17 /Users/jmax/Documents/websites/max_magento/app/code/core/Mage/Core/Model/App.php(340): Mage_Core_Controller_Varien_Front->dispatch()
#18 /Users/jmax/Documents/websites/max_magento/app/Mage.php(627): Mage_Core_Model_App->run(Array)
#19 /Users/jmax/Documents/websites/max_magento/index.php(80): Mage::run('', 'store')
#20 {main}

First thing I tried: I completely disabled my extension. So, it is not my extension, but maybe it caused some change in the database that caused that. I have been developing my extension using the proper coding methods (not modifying core files, and extending as opposed to overriding as much as possible).

It appears as if the order’s increment id is not being set! I went back to Mage_Eav_Model_Entity_Type -> fetchNewIncrementId (line 141), and found that it returns void on line 145 after finding there is not increment model:

144: if (!$this->getIncrementModel()) {
145:    return false;
146: }

And, here is the SQL query that causes the problem (obviously it is not increment id):

INSERT INTO `sales_flat_order` (`coupon_code`, `protect_code`, `shipping_description`, 
`is_virtual`, `store_id`, `customer_id`, `base_discount_amount`, `base_grand_total`, 
`base_shipping_amount`, `base_shipping_tax_amount`, `base_subtotal`, `base_tax_amount`,
`base_to_global_rate`, `base_to_order_rate`, `discount_amount`, `grand_total`, 
`shipping_amount`, `shipping_tax_amount`, `store_to_base_rate`, `store_to_order_rate`, 
`subtotal`, `tax_amount`, `total_qty_ordered`, `customer_is_guest`, `customer_note_notify`, 
`customer_group_id`, `gift_message_id`, `quote_id`, `base_shipping_discount_amount`, 
`base_subtotal_incl_tax`, `shipping_discount_amount`, `subtotal_incl_tax`, `weight`, 
`customer_dob`, `increment_id`, `applied_rule_ids`, `base_currency_code`, `customer_email`, 
`customer_firstname`, `customer_lastname`, `customer_middlename`, `customer_prefix`, 
`customer_suffix`, `customer_taxvat`, `discount_description`, `global_currency_code`, 
`order_currency_code`, `remote_ip`, `shipping_method`, `store_currency_code`, `store_name`, 
`x_forwarded_for`, `customer_note`, `created_at`, `updated_at`, `total_item_count`, 
`customer_gender`, `hidden_tax_amount`, `base_hidden_tax_amount`, `shipping_hidden_tax_amount`, 
`base_shipping_hidden_tax_amount`, `shipping_incl_tax`, `base_shipping_incl_tax`) VALUES (NULL, 
'aa53a6', 'Flat Rate - Fixed', '0', '1', '4', '0', '55', '5', '0', '50', '0', '1', '1', '0', 
'55', '5', '0', '1', '1', '50', '0', '1', '0', '1', '1', NULL, '38', '0', '50', '0', '50', 
'1', NULL, '', '', 'USD', '[e-mail]', 'J', 'Max', NULL, NULL, NULL, NULL, '', 'USD', 
'USD', '127.0.0.1', 'flatrate_flatrate', 'USD', 
'Main Website\nMain Website Store\nDefault Store View', NULL, NULL, '2011-07-19 15:23:28', 
'2011-07-19 15:23:28', '1', NULL, '0', '0', '0', '0', '5', '5')

Is there any other information that I can provide to help come to a solution? Thank you SO much!

JMax

Answer 1

Did you add any attributes to the sales/order model? In that, if you do not specifiy the increment model when adding the attribute sales/order will lose it’s increment model. This will stay even if you switch off your extension again.

$installer->installEntities(
    'order'    => array(
        'entity_model'        => 'order',
        'table'               => 'sales/order',
        'increment_model'     => 'eav/entity_increment_numeric', //<-- This is important and might have caused the trouble!!!
        'increment_per_store' => true,
        'backend_prefix'      => 'sales_entity/order_attribute_backend',
        'attributes'          => array(
            'my_new_attribute' => array(
            'label'            => 'Omx Gift Certificates',
            'type'             => 'text',
            'global'           => Mage_Catalog_Model_Resource_Eav_Attribute::SCOPE_GLOBAL,
            'visible'          => true,
            'required'         => false,
            'user_defined'     => true,
        ),
    )
);

If that is the source you can do the following:
Erase the added columns (in this case: my_new_attribute) from the sales_flat_order table and rerun the installer of your extension (with specified increment_model of course…).

j.