I vaguely remember hearing about this issue at some point, but I don't remember the details. In any case, when a user has regular products in their cart, and then clicks on a Paypal subscription link, then their cart is emptied. How can I prevent this?

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mrtoner’s picture

mrtoner commented
Title: Cart is emptied upon transfer to Paypal » Save existing cart when UC PayPal Buttons is used
Category: support » feature

Looked at the code and there doesn't appear to be a way around this. (Well, without re-writing the code.) UC PayPal Buttons uses a UC cart for creating the order, using this process:

1. Empty any existing cart
2. Add the purchased item to the cart
3. Create the order
4. Put the cart into the order
5. Save the order
6. Empty the cart

Two additional steps could solve this issue:

0. Save any existing cart
...
7. Restore any existing cart

Of course, the coding would be a little more complex than that, but we can at least mark this as a feature request.