Commerce: Is there any way to give a discount for Product A if the costumer buy 3 Product B?

Question

In Craft Commerce 3, there is a Order Condition Formula that allow us to condition for the discount. So here is my Case.

• I have product A and Product B, so I will give a discount to Product A if the costumer buy 3 of Products B.

I tried to use this formula

order.lineItems|filter(v => (v.sku == 'SKU A' and qty >= 3) )

but the filter is not allowed in this formula, so is there any other way to approach this?

Answer 1

We will need to uncomment this line to allow |filter used in condition formulas:

https://github.com/craftcms/commerce/blob/develop/src/services/Formulas.php#L198

If you do that manually yourself this formula works:

order.lineItems|filter(v => (v.sku == 'BBB' and v.qty >= 3) )

You were missing the v. in front of qty.

Look in the next version of commerce for the |filter being available.