Limit discounts based on lineItem conditions

[nilsenpaul]

Right now, it's very easy to limit a discount to certain orders using the order condition field. It would be great if we could also limit discounts based on lineItem conditions.

Example:

One of our clients sells wines. Each product has a bottle variant, and a box variant. The discount we're adding, should only apply to bottle variants. Selecting all bottle variants would not be possible for 1500 (and growing) products. Having a Line item condition field would allow us to say lineItem.purchasable.unit == "bottle", after which the discount would only apply to those line items. A condition builder for line items would be even better!