[WC] cart gets emptied with multiling variable products

[wywarren]

I created a variable product with multiling attributes and variations. Added a few to cart and bounced between cart and checkout (without switching languages) and at some point the items will disappear saying "AAA has been removed from your cart because it has since been modified.". It seems to have been plaguing users on WPML as well.

Please see:
https://wpml.org/forums/topic/problem-item-has-been-removed-from-your-cart-because-it-has-since-been-modified/

I will do a database/source code deep dive later next week but it seems to be a problem internally with woocommerce not playing well with multilingual content.

[herrvigg]

I haven't found time to look at this but if you experiment some stuff please try to do with the PR to integrate the new modules: #627. This will be quite a big change also to handle these specific bugs more easily. Also, once this becomes a new plugin these modules might become again new separate projects as git submodules but they should not be separate WP plugins. This is the plan but i'll come back to this later.

About empty cart i found this old issue but there was no mention of variable product. Maybe it was the same case, maybe not: #517

[herrvigg]

@wywarren is it directly related to #612 ? It would be good if we could cleanup the tickets to better see what is remaining now.

[herrvigg]

@wywarren also here, could you try with PR #790 to see if this solves this issue?

[alelkin]

If you use #790 final file qwc-front.php it stops showing any variations

[herrvigg]

@alelkin the change of #790 has not been merged for the reasons i explained in that ticket. These corrections were done differently in 3.7.3. See #612.

This ticket here is a different topic i think. I don't know the current status. Let's forget about #790 because it's not relevant anymore. The discussion here should only concern the problem described earlier with the empty cart.

If it's a different topic please open a new ticket describing the problem precisely with all the info about the versions you are using.

[alelkin]

Got it.

So the problem is still here in version 3.8.0.
In addition to issue - when you add attributes in Admin pannel language switcher does not recognise those fields as translatable. So when you click any language noting happens.

[alelkin]

First tests of 3.8.1 version:
If you turn on function of "Redirecti to cart after adding order" it works. But when you go to checkout - it says again, that cart was epmtied.
If function "Redirecti to cart after adding order" is turned off it shows, that order was added to cart. But if you refresh any page, go to cart or other products - cart is emptied.