Magento: How to save/overwrite additional data during checkout? [closed]

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Is there any possibility to save/overwrite some individual fields during the customization of a bundled product? Because there is no possibility to add individual options to a bundled product with a dynamic price, I need to know how the user can add some additional information (like a text for an engraving, or image upload) during the order process of a bundle?!

Therefore I also can´t use attributes, as I read, because they are fixe开发者_如何学Pythond for all products and couldn't be manipulated for an order item separately...

Can anybody help me with this?

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You have got catalog price rules and shopping cart price rules feature in magento. You can relate banners as well for rules. I hope you can try to achieve your requirement by using this feature if my understanding of the question is right.