Maximum number of items a discount can be applied to

[SteveKaran]

Shopify's native discounts have a minimum number of items, but no MAXIMUM. For example, I want to apply a discount for up to 5 items, and no more. There seems to be a function called "split" with Shopify Scripts (Shopify Plus plans only), but scripts will be deprecated in place of Functions. Short of writing a custom function using the Discounts API, anyone know how apply a maximum number of items a discount can be applied to? Or some way to minic the "split" feature from Shopify Scripts?

[Liam]

Hi SteveKaran,

There's currently no native functionality in Shopify to limit the maximum number of items a discount can be applied to. However, you could use functions via the Product Discount API or Order Discount API to create a discount that applies only to a specific number of items. For your use case you could modify the price of each of the first 5 items of a particular product in the cart, and then leave the price of any additional items unchanged.

I'd recommend exploring the docs linked above and seeing if this will work for you!

[SteveKaran]

Thanks Liam,

Already looked into this a bit, which is why I mentioned the "split" command with Shopify Scripts. I'll be writing my own Function using the Product Discount API to test how it behaves. If I have a line item with 6+ items, and my criteria (if condition) is <= 5, the criteria will fail, and a discount probably won't apply. I'll probably have to apply some additional logic to split a cart line into two lines; one with qty 5, the other with qty 1, so that the line with qty 5 qualifies for the discount, and the line with qty does not. Hmmm....

[SteveKaran]

So I did some testing last night by building my own function using the Discount API. As I had anticipated, simply setting a condition of quantity <=5 will apply the discount correctly, but as soon as I increase the quantity to 6+, the discount is removed. Scripts provided a "simple" way to split the line in order to ensure a discount would still apply. With Functions, it's going to be a bit trickier. I have some ideas, and I'm open to suggestions.

[ccsachs]

Did you find a solution for this? 
I am hoping to do the same, offer a discount but limit it to a maximum number of items in the cart.

[SteveKaran]

Unfortunately I did not investigate this further as my customer's requirements had changed. As I think of it now, one approach would be to use unique hidden line item properties (starting with "_") so that cart lines can be treated independently (even if it's the same product/variant).

You'll probably also have to write/update/modify a custom cart update method (front-end JS) in order to split the cart lines once the "maximum" quantity has been reached. For example, if the discount applies for up to 5 items, then split the cart lines into two separate lines when the 6th item is added to the cart. This would be similar behaviour to the "split" function from Scripts.

[Hirano_00]

Hi @SteveKaran, @ccsachs 

Steppun Discount is a discount application that allows you to limit the maximum quantity.
Please check it out.

https://apps.shopify.com/steppun-discount