Buy one product, get one product half price

Question

I'm trying to create a shopping cart price run whereby if you buy one of a product in one category, you get one of a product in another category at 50%. I'm trying to also maintain a 1 to 1 ratio on the discount, eg:

If I buy 1 from category A I get 1 from category B at 50%

If I have 1 item from category A and 2 items from category B, only one item from category B gets the 50% discount, the other is at full price.

If I have 2 items from category A, 2 items from category B get 50% off additional items from category B are at full price.

I've set the following on the Actions tab:

Discount Amount 50

Maximum Qty Discount is Applied To 1

Discount Qty Step (Buy X) 1

Stop Further Rules Processing No

If any of these conditions are true, category is category B

As it runs now, if I put one item from category A all of category B get the 50% discount. I'm stumped on this one...

Answer 1

It is not possible by default in Magento as far as i know but it can be easily done if you observe this event salesrule_validator_process

Answer 2

This is possible.

In the admin panel, click on Promotions -> Shopping Cart Price Rules (because we are dealing with products in the cart)

In the Conditions tab,click the little plus symbol and select 'Product Attribute Combination'.

Select the new plus symbol and select category. Click on the '...' and select the category for the products you want to have in the basket for you to get the discount.

Now click on the Actions tab, in 'Apply' have 'Percent of product price discount'. In Discount Amount, enter 50 (for 50%). In the conditions at the bottom, click on the plus symbol and select Category. Click on the '...' to select the category for the products you want to apply the 50% discount to.

This will get you 50% off all products in cat b when you have >= 1 products from cat a in the cart.

There are further conditions that can be specified (minimum number of products from cat a, maximum number of products to apply discount to). It will require a lot of experimentation to get the conditions correct for your specific needs, but hopefully I have pointed you in the right direction.

Answer 3

Under Conditions tab, select total quantity to be greater than 2 for that product. Now under Actions tab

1. Apply: Percent of product price discount
2. Discount Amount: 25%
3. Discount Qty Step (Buy X): 2

And in apply rule section select your sku