Partial.ly is an app that you can add to your Shopify store that allows your customers to buy on a payment plan. Now, if you want to exclude some products from this service, here's how to do it.
The way it works is that we'll add a 'No Partially' tag to products that we want to exclude from Partial.ly payments. Then we'll edit the liquid code on two pages, products and cart, to hide it for these products.
The files that you'll need to edit may vary by theme and what sort of cart (page, pop-up, mini, etc.) you are using. And the existing Partial.ly code will also vary based on the implementation in your store.
Product Page
Here's how to wrap the Partially include in the Product template. Lines 1 and 3 are the code that you'll add around the Partial.ly code. Keep your Partial.ly code, in this case line 2 -- don't replace with the code below.
Cart Page
And here's how to wrap the Partially code in the Cart template. Lines 1-8 and 27 are the code that you'll add around the existing Partial.ly code. Keep your Partial.ly code, in this case lines 9-26 -- don't replace with the code below. This code will check to see if any of the products in the cart are tagged 'No Partially'. If any products are tagged then the Partial.ly option will be hidden from the user and they will have to pick from the remaining checkout/payment options available.
Testing
As always, test it thoroughly to ensure that things are working properly. Check that the Partial.ly element shows on products that are not tagged 'No Partially' and does not show on products that are tagged. In the cart, test it with no tagged products, only tagged products, and a mix of tagged and not tagged products.