How can I apply automatic BOGO only to a specific collection without using promo codes?

Technical Q&A
1

Hi!

We are trying to run a BOGO sale via scripts on available to items only in a specific collection. We would not like to have promo codes able to be applied to the BOGO pairs, but do want to let them apply to items outside the collection or, for instance, if they bought just one item from the BOGO collection. Can anyone provide any assistance? I have scripts for BOGO on all items and automatic discounts, but do not have enough experience to write what we’re trying to accomplish. Thanks!

2

Hey Mate,

Could you post the BOGO script you’re currently using. I can give you some advice on what needs changing to get this working.

Cheers,

Elliott

3

PAID_ITEM_COUNT = 1
DISCOUNTED_ITEM_COUNT = 1

Returns the integer amount of items that must be discounted next

given the amount of items seen

#if Input.cart.discount_code !=nil ## Commented out - if left in will either apply promo code if input, or run BOGO Script

Output.cart = Input.cart

.exit

end

def discounted_items_to_find(total_items_seen, discounted_items_seen)
Integer(total_items_seen / (PAID_ITEM_COUNT + DISCOUNTED_ITEM_COUNT) * DISCOUNTED_ITEM_COUNT) - discounted_items_seen
end

Partitions the items and returns the items that are to be discounted.

Arguments

---------

* cart

The cart to which split items will be added (typically Input.cart).

* line_items

The selected items that are applicable for the campaign.

def partition(cart, line_items)

Sort the items by price from high to low

sorted_items = line_items.sort_by{|line_item| line_item.variant.price}.reverse

Create an array of items to return

discounted_items =

Keep counters of items seen and discounted, to avoid having to recalculate on each iteration

total_items_seen = 0
discounted_items_seen = 0
@percent = Decimal.new(50) / 100.0

Loop over all the items and find those to be discounted

sorted_items.each do |line_item|
total_items_seen += line_item.quantity

After incrementing total_items_seen, see if any items must be discounted

count = discounted_items_to_find(total_items_seen, discounted_items_seen)

If there are none, skip to the next item

next if count <= 0

if count >= line_item.quantity

If the full item quantity must be discounted, add it to the items to return

and increment the count of discounted items

discounted_items.push(line_item)
discounted_items_seen += line_item.quantity
else

If only part of the item must be discounted, split the item

discounted_item = line_item.split(take: count)

Insert the newly-created item in the cart, right after the original item

position = cart.line_items.find_index(line_item)
cart.line_items.insert(position + 1, discounted_item)

Add it to the list of items to return

discounted_items.push(discounted_item)
discounted_items_seen += discounted_item.quantity
end
end

Return the items to be discounted

discounted_items
end

eligible_items = Input.cart.line_items.select do |line_item|
product = line_item.variant.product
!product.gift_card? && product.tags.include?(‘bogo’)# added product tags for specific collection hopefully#&& product.id == 10779999630 - Commented out, instead a specific item, apply to all
end

discounted_line_items = partition(Input.cart, eligible_items)
discounted_line_items.each do |line_item|
line_discount = line_item.line_price * @percent
line_item.change_line_price(line_item.line_price - line_discount, message: “Buy one, get one FREE”)
end

Output.cart = Input.cart