Magento1 – Onepage Checkout Returns Error 500

javascriptmagento-1onepage-checkout

I installed a theme in Magento 1 that is just working with onepage checkout. In general that is fine, but somehow it is not working. First, I type in my billing address/shipping address, but it stops and then it redirects me to the cart page.

However, if I debug the javascript in chrome, I get

500 (Internal Server Error)

POST

http://127.0.0.1/magento/index.php/checkout/onepage/saveBilling/

So, I was searching for the saveBilling Method in /app/code/core/Mage/Checkout/Type/onepage.php. But this function works fine and returns no error.

Any idea what next steps I could do to find that error? is it possible to extend that Method maybe? If yes, how can I look up for it?

Best Answer

Your shop fails while doing the ajax request, presumably there is something wrong with the quote-object that causes an exception, and if this happens, you are redirected to the cart. I have debugged such errors in the past by doing this:

turn on the Magento developer mode and error_reporting
check that [magento]/var/log/ is writable by the webserver, sometimes this means they need permissions "777"
I use Google Chrome, so I open the developer tools and change to the "Network" tab
walk through the checkout; as soon as you notice the site reloading, hit "ESC" and inspect the ajax-request you now see in the "Network"-tab. It should display an error with a stacktrace.

Related Solutions

Magento 1 – Fix 500 Server Error on Checkout Page with APC

My sys admin enabled fully core dumps and found that APC was throwing an error.

Apparently APC and PHP 5.4.5 has some kind of bug:

https://bugs.php.net/bug.php?id=62587

After removing APC off the server completely I confirmed that the error has stopped.

Magento – default magento onepage checkout success page gives 404 error

Finally, I figured out root cause. Every questions answered by following preDispatch() function written in OnepageController (app\code\core\Mage\Checkout\controllers\OnepageController.php)

    if (!$this->_canShowForUnregisteredUsers()) {
        $this->norouteAction();
        $this->setFlag('',self::FLAG_NO_DISPATCH,true);
        return;
    }

If you further look into _canShowForUnregisteredUsers() function

protected function _canShowForUnregisteredUsers()
{
    return Mage::getSingleton('customer/session')->isLoggedIn()
        || $this->getRequest()->getActionName() == 'index'
        || Mage::helper('checkout')->isAllowedGuestCheckout($this->getOnepage()->getQuote())
        || !Mage::helper('checkout')->isCustomerMustBeLogged();
}

This code is checking following configuration:

 system > configuration > checkout > allow guest checkout > No
 system > configuration > checkout > Require Customer To Be Logged In To Checkout > Yes

So checkout/onepage/success is not allowed for unregistered user, so norouteAction() method redirecting to 404 error page.

To fix this issue if you are using above settings then you can override preDispatch() method of checkout onepage controller or writing Observer to check checkout preDispatch event and write needed code. check here for list of Magento events.

Best Answer

Related Solutions

Magento 1 – Fix 500 Server Error on Checkout Page with APC

Magento – default magento onepage checkout success page gives 404 error

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