Shopify Script #3 - Bulk Discount (Product Category and Quantity)

script.rb

# Bulk Discount based on Product Category and Quantity

# Applied product types
# Example with 2 categories: ["Backpack", "T-Shirt"]
PRODUCT_TYPES = ["Backpack"]

# Custom message
CHECKOUT_MESSAGE = "Bulk Discount 25% Off"

# Discount value, should be a number without "%"
DISCOUNT_VALUE = 25

# Minimum quantity of the product when discount should apply
REQUIRED_QUANTITY = 10


# === Do not change anything below ===

percent_discount = Decimal.new(DISCOUNT_VALUE) / 100.0

cart = Input.cart


  cart.line_items.each do |line_item|
    product = line_item.variant.product
    # Check the product type
    if PRODUCT_TYPES.collect{|el| el.downcase }.include?(product.product_type.downcase)
      # Check product quantity
      if line_item.quantity >= REQUIRED_QUANTITY
        # Apply discount
        line_discount = line_item.line_price * percent_discount
        line_item.change_line_price(line_item.line_price - line_discount, message: CHECKOUT_MESSAGE)
      end
   end

  end
  

Output.cart = Input.cart