Hello. I'm trying to add a custom product field called "aid" to the products on our website (woodsmithplans.com, v. 0.7.2). I can add them to the cart just fine, but they don't get transferred from the cart to the checkout. For instance, if you look on the example page http://www.woodsmithplans.com/plan/fireplace-surround/?aid=2
and open the web inspector to see the form connected to the Add to Cart button, you'll see the aid value there, and if you add the product to your cart, it works. But, when you continue to the checkout page, the aid value is no longer there, nor in the json, and it does not show up in the datafeed after the transaction is submitted either, as far as I can tell. This does not seem to be an issue of the value simply being hidden in the checkout, because it shows up in the checkout on our other sites that do similar things. I thought that it might be due to the version, but I looked at the documentation for 0.7.2, and it shows that custom product attributes are supported (https://wiki.foxycart.com/v/0.7.2/products#standard_product_options
). I also thought this might be due to an incorrect hashed value that does not match the stated value of the input tag, so I tried explicitly entering values that did not match, but it gave me an error, not this result, so that is not the problem either. I also thought that maybe the string "aid" was conflicting with some unseen FoxyCart variable, so I tried a few other variable names instead, to no avail. Any ideas?