Migrating a buy one get one free script
Shopify shipped this as a starter template, so it is everywhere. The line that matters divides the quantity by the paid units PLUS the free one, which is what makes a nine-unit cart earn two free instead of three.
可重建It split the free units off each complete set and repriced them to zero.
把它粘贴到 Scripts 救援，看看会重建成什么
- 用本页任意 Script 旁边的按钮复制 Ruby 代码。
- 在 Shopify 后台打开 Stackable，依次进入工具、Scripts 救援。
- 粘贴进去，读一读工具说它会创建什么，再和本页的设置逐项对照。
Scripts 救援属于 Pro 套餐。在您填写旧 Script 的折扣金额、且两个数字精确到最小货币单位完全一致之前，不会发布任何内容。
Script 本体
可重建危险配对 D3。这个文件和它的搭档看起来几乎一样，行为却不同，在判断您手上是哪一个之前，请把两份都读一遍。
BUY = 3
GET = 1
Input.cart.line_items.each do |line_item|
sets = line_item.quantity / (BUY + GET)
free_count = sets * GET
next if free_count == 0
discounted = line_item.split(take: free_count)
discounted.change_line_price(Money.zero, message: "Buy 3 get 1 free")
Input.cart.line_items << discounted
end
Output.cart = Input.cart识别为 Buy X, get Y，重建为 bxgy 类型的优惠。下面是优惠实际保存时使用的配置键，您可以逐项核对自己的重建结果。
| 设置项 | 值 | 配置键 |
|---|---|---|
| Offer type | bxgy | type |
| Counting | per_group | counting |
| Recurrence | repeat | recurrence |
| Tier 1 | min qty 3 -> free item | tiers[0] |
| Buy quantity | 3 | bxgy.buyQty |
| Get quantity | 1 | bxgy.getQty |
| Get selection | same_item | bxgy.getSelection |
| Reward on the get units | 100% off | bxgy.getDiscountPct |
| Free units are additional | true | bxgy.freeUnitsAreAdditional |
| Target scope | all | target.scope |
| Method | automatic | discountMethod |
| Allocation | standard | stacking.allocation |
| Combines with other discounts | no | stacking |
- Confirm which products this applies to. We could not read product targeting from the script.
基于我们的公开演示店铺 Meridian Goods 搭建，因此这里的每个价格都可以复现，而不必凭信任接受。下方的折扣金额，是结账时运行的同一个引擎针对这个购物车算出的结果。
| 商品 | 数量 | 单价 |
|---|---|---|
| Braided USB-C Cable | 4 | $14.00 |
| 小计 | $56.00 | |
| 折扣 | -$14.00 | |
| 总额 | $42.00 | |
未登录，或以没有标签的客户身份登录。
发布之前，工具会询问您原来的 Script 对一个现有购物车做了什么。把它设为 4 件 Braided USB-C Cable，单价 $14.00，答案就是固定的。
折扣金额为 $14.00。顾客实际支付的总额为 $42.00。
比对精确到您所用货币的最小单位。差一分钱，发布就仍然被拦住，这正是这一步的意义。
- drop to 1 of the same product, under what the rule needs
| 商品 | 数量 | 单价 |
|---|---|---|
| Braided USB-C Cable | 1 | $14.00 |
| 小计 | $14.00 | |
| 总额 | $14.00 | |
未登录，或以没有标签的客户身份登录。
两个看起来一样的文件
下面每一对都是同一种 Script 写法的两个版本。它们只差一两行，效果却不同，所以在判断自己手上是哪一个之前，请把两个都读一遍。
危险配对 D3
Bogo same item free (D3)
可重建重建为 bxgy 优惠。
在它自己的购物车中的折扣：$14.00
sets = line_item.quantity / (BUY + GET)Bogo inclusive basis (D3)
可重建重建为 bxgy 优惠。
在它自己的购物车中的折扣：$14.00
sets = line_item.quantity / BUY常见问题
- Will Stackable rebuild this script?
- Yes. Every spelling on this page is rebuilt today as a bxgy offer, and the cart above is the one that proves it.
- What cart proves it works?
- 4 x Braided USB-C Cable at $14.00. The engine takes $14.00 off, and checkout charges $42.00.
- What will I have to check before publishing?
- Confirm which products this applies to. We could not read product targeting from the script.
相关的 Script 类型
The same buy-and-get offer, counted so the reward sits inside each set rather than beside it.
The discount applied to the first few units only, with the rest at full price.
The least expensive thing in the cart discounted, once.