Error deleting or decreasing products in cart

[Anni_wi]

Hi!

 

I'm having a big problem that I've been trying to solve for some time now. I have searched the forum and Google for an answer but no fix helps. I really need help with this since I believe that this error causing me to loose many sales.

 

If I try to delete a product from the cart or decrease the quantity I get the following error message:

 

TECHNICAL ERROR: unable to save update quantity Details: Error thrown: [object Object] Text status: parsererror

 

If I hit refresh the product has actually been deleted but I dont think all my customers will try that, they will also get a blank screen if it was only one product in the cart and blanks screens are of course not good.

 

I run Prestashop 1.6.0.9

My site is www .afrostore.se

 

Is there some one who has a fix for this?

 

Hoping for the best!

Anni
 

[vekia]

your quick order page is totally blank for me

i can't test it.

[soniass]

Hi vekia,

I have the same problem in the site : www.interposter.fr

I can't find the solution in the forum

Thank you in advance

[Totti]

Same error with 1.6.1.0

[NemoPS]

Are you using any module like Attribute Wizard Pro?

[vekia]

Same error with 1.6.1.0

 

Hello Andrea :-)

you're reffering to supplementmuscle shop?

[innovacy]

This is definetely an error in the returned json response, which probably contains some exception instead of a properly formatted json response. I have seen this before. 

 

One of your modules might throw an error. I would try first to disable all non-standard modules (there's an option in the backoffice to do that, you don't have to go through all modules) and see if it works. If yes, then go one by one through the additional modules you have installed, disabling them and testing again until you find the culprit. 

 

If however you get still the same error with the non-standard modules disabled, then the error must occur somewhere from the original code. 

 

In general, you need to see the responde the javascript is getting back usually, this should give you the hints needed to figure out the proble. If you are a developer this should be easy. You find in cart-summary.js an ajax call and in it's success function, you add a console.log() output.

 

Take as example this function: 

function deleteProductFromSummary(id)
{
	var customizationId = 0;
	var productId = 0;
	var productAttributeId = 0;
	var id_address_delivery = 0;
	var ids = 0;
	ids = id.split('_');
	productId = parseInt(ids[0]);
	if (typeof(ids[1]) !== 'undefined')
		productAttributeId = parseInt(ids[1]);
	if (typeof(ids[2]) !== 'undefined' && ids[2] !== 'nocustom')
		customizationId = parseInt(ids[2]);
	if (typeof(ids[3]) !== 'undefined')
		id_address_delivery = parseInt(ids[3]);
	$.ajax({
		type: 'POST',
		headers: { "cache-control": "no-cache" },
		url: baseUri + '?rand=' + new Date().getTime(),
		async: true,
		cache: false,
		dataType: 'json',
		data: 'controller=cart'
			+ '&ajax=true&delete=true&summary=true'
			+ '&id_product='+productId
			+ '&ipa='+productAttributeId
			+ '&id_address_delivery='+id_address_delivery
			+ ((customizationId !== 0) ? '&id_customization=' + customizationId : '')
			+ '&token=' + static_token
			+ '&allow_refresh=1',
		success: function(jsonData)
		{
                        console.log(jsonData);
			if (jsonData.hasError)
			{
				var errors = '';
				for(var error in jsonData.errors)
					//IE6 bug fix
					if(error !== 'indexOf')
						errors += $('<div />').html(jsonData.errors[error]).text() + "\n";
									if (!!$.prototype.fancybox)
											$.fancybox.open([
													{
															type: 'inline',
															autoScale: true,
															minHeight: 30,
															content: '<p class="fancybox-error">' + errors + '</p>'
													}],
													{
															padding: 0
													});
									else
											alert(errors);
			}
			else
			{
				if (jsonData.refresh)
					location.reload();
				if (parseInt(jsonData.summary.products.length) == 0)
				{
					if (typeof(orderProcess) == 'undefined' || orderProcess !== 'order-opc')
						document.location.href = document.location.href; // redirection
					else
					{
						$('#center_column').children().each(function() {
							if ($(this).attr('id') !== 'emptyCartWarning' && $(this).attr('class') !== 'breadcrumb' && $(this).attr('id') !== 'cart_title')
							{
								$(this).fadeOut('slow', function () {
									$(this).remove();
								});
							}
						});
						$('#summary_products_label').remove();
						$('#emptyCartWarning').fadeIn('slow');
					}
				}
				else
				{
					$('#product_' + id).fadeOut('slow', function() {
						$(this).remove();
						cleanSelectAddressDelivery();
						if (!customizationId)
							refreshOddRow();
					});
					var exist = false;
					for (i=0;i<jsonData.summary.products.length;i++)
					{
						if (jsonData.summary.products[i].id_product == productId
							&& jsonData.summary.products[i].id_product_attribute == productAttributeId
							&& jsonData.summary.products[i].id_address_delivery == id_address_delivery
							&& (parseInt(jsonData.summary.products[i].customization_quantity) > 0))
								exist = true;
					}
					// if all customization removed => delete product line
					if (!exist && customizationId)
						$('#product_' + productId + '_' + productAttributeId + '_0_' + id_address_delivery).fadeOut('slow', function() {
							$(this).remove();
							var line = $('#product_' + productId + '_' + productAttributeId + '_nocustom_' + id_address_delivery);
							if (line.length > 0)
							{
								line.find('input[name^=quantity_], .cart_quantity_down, .cart_quantity_up, .cart_quantity_delete').each(function(){
									if (typeof($(this).attr('name')) != 'undefined')
										$(this).attr('name', $(this).attr('name').replace(/nocustom/, '0'));
									if (typeof($(this).attr('id')) != 'undefined')
										$(this).attr('id', $(this).attr('id').replace(/nocustom/, '0'));
								});
								line.find('span[id^=total_product_price_]').each(function(){
									$(this).attr('id', $(this).attr('id').replace(/_nocustom/, ''));
								});
								line.attr('id', line.attr('id').replace(/nocustom/, '0'));
							}
							refreshOddRow();
						});
				}
				updateCartSummary(jsonData.summary);
				if (window.ajaxCart != undefined)
					ajaxCart.updateCart(jsonData);
				updateCustomizedDatas(jsonData.customizedDatas);
				updateHookShoppingCart(jsonData.HOOK_SHOPPING_CART);
				updateHookShoppingCartExtra(jsonData.HOOK_SHOPPING_CART_EXTRA);
				if (typeof(getCarrierListAndUpdate) !== 'undefined' && jsonData.summary.products.length > 0)
					getCarrierListAndUpdate();
				if (typeof(updatePaymentMethodsDisplay) !== 'undefined')
					updatePaymentMethodsDisplay();
			}
		},
		error: function(XMLHttpRequest, textStatus, errorThrown) {
			if (textStatus !== 'abort')
			{
				var error = "TECHNICAL ERROR: unable to save update quantity \n\nDetails:\nError thrown: " + XMLHttpRequest + "\n" + 'Text status: ' + textStatus;
				if (!!$.prototype.fancybox)
				    $.fancybox.open([
			        {
			            type: 'inline',
			            autoScale: true,
			            minHeight: 30,
			            content: '<p class="fancybox-error">' + error + '</p>'
			        }],
					{
				        padding: 0
				    });
				else
				    alert(error);
			}
		}
	});
}

I've added below that line: 

success: function(jsonData)

the following:

console.log(jsonData);

Now open the browser inspector, try reducing the quantity (if the quantity turns zero, the delete function modified here is called too) or delete the product from cart and check your console output. It should be showing you what the response and as that the possible exception was. 

[innovacy]

Correction after seeing the error message again, I had something else in mind that doesn't apply here. 

 

You need actually to output the data in the error: section of the ajax call, not the success: section. As that's the part that is being executed here. 

 

The code: 

console.log(XMLHttpRequest);

This will show you all the data, that is shown only as "[object Object]" in Prestashop's error message, which isn't helpful. 

Edited July 4, 2015 by innovacy (see edit history)

[Totti]

Yes supplementmuscle.com

 

What I've noticed that if I put a cart then increase the amount eerore me the attachment.

Then if I change the page gives me fatal error.

[Krystian Podemski]

I see error: Uncaught ReferenceError: updateCarrierSelectionAndGift is not defined

 

First of all:

1. Disable cache, CCC mechanisms,

2. Enable debug mode, change _PS_DEV_MODE_ from false to true in config/defines.inc.php

 

this should help with our little investigation here

[Totti]

I've already tried, is the form to the mark.

Even disabling but got the same error.

If I enable the debug is displayed around the source of the page.

[Krystian Podemski]

You had enabled profiler too?

[Totti]

I enabled debugging can see them now.

[Krystian Podemski]

Could you edit Product.php file and before this line:

https://github.com/PrestaShop/PrestaShop/blob/1.6/classes/Product.php#L2635

 

add:

 

var_dump($usetax);

echo '<br />';

var_dump($id_product);

[Totti]

Done

[Krystian Podemski]

Ugh, this doesn't show anything suspicious, you can try temporary comment this code below, remove this code from me and try to comment these two lines with if clause

 

After all you can try to disable non native modules and overrides by switichng options in Advanced Parameters -> Performance

Edited July 4, 2015 by Krystian Podemski (see edit history)

[Totti]

I did that too but this option does not work, the modules nonnative you always see.

[innovacy]

Totti, the function updateCarrierSelectionAndGift() is required only for the one-page-checkout, not the 5-step checkout. It also is defined in the javascript that is only loaded with the one-page-checkout. 

 

On your page you have the 5-step checkout active though. You might be using some module that doesn't properly distinguish between them. 

 

As you have the option to compress Javascripts I can't see in which file this occurs. Can you deactivate it, so I might be able to tell you then exactly what to modify?

[Totti]

I deactivate compress Javascripts !

 

Thanks.

[Totti]

I discovered which is the module that is causing the error: Push On Cart

If you disable it all works.