Migrating a free shipping over a threshold script
If a Plus store had exactly one shipping script, it was this one. It is also the entry where the app’s own preview and the real checkout quote different savings on purpose, and knowing why is worth two minutes on camera.
RebuiltIt discounted every delivery rate to zero once the cart subtotal passed a threshold.
Paste it into Scripts rescue and watch what it rebuilds
- Copy the Ruby with the button beside any Script on this page.
- In your Shopify admin, open Stackable, then Tools, then Scripts rescue.
- Paste it there, read what the tool says it will build, and compare that with the settings on this page.
Scripts rescue is on the Pro plan. Nothing is published until you tell it what your old Script charged and the two figures match to the cent.
The Script
RebuiltInput.shipping_rates.each do |shipping_rate|
if Input.cart.subtotal_price >= Money.new(cents: 5000)
shipping_rate.apply_discount(shipping_rate.price, message: "Free shipping over $50")
end
end
Output.shipping_rates = Input.shipping_ratesRecognised as Shipping discount and rebuilt as a free_shipping offer. These are the real configuration keys the offer is saved with, so you can check your own rebuild against them field by field.
| Setting | Value | Config key |
|---|---|---|
| Offer type | free_shipping | type |
| Counting | per_cart | counting |
| Recurrence | once | recurrence |
| Tier 1 | min spend $50.00 -> 100% off | tiers[0] |
| 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.
- This discounts every shipping rate at checkout, not one named rate.
Built on our public demo store, Meridian Goods, so every price here can be reproduced rather than taken on trust. The discount below is what the same engine that runs at checkout computes for this exact cart.
| Item | Qty | Unit price |
|---|---|---|
| Ceramic Travel Mug | 1 | $22.00 |
| Summit Insulated Bottle | 1 | $28.00 |
| Subtotal | $50.00 | |
| Delivery, normally $6.90 | $0.00 | |
| Total | $50.00 | |
Signed out, or signed in as a customer with no tags.
This rebuild only changes shipping. We price shipping against a sample rate rather than the rate your shopper saw, so there is no figure here we could honestly compare. Publishing records that the amount was not checked.
- swap the cart for a single Braided USB-C Cable
| Item | Qty | Unit price |
|---|---|---|
| Braided USB-C Cable | 1 | $14.00 |
| Subtotal | $14.00 | |
| Total | $14.00 | |
Signed out, or signed in as a customer with no tags.
Common questions
- Will Stackable rebuild this script?
- Yes. Every spelling on this page is rebuilt today as a free_shipping offer, and the cart above is the one that proves it.
- What cart proves it works?
- 1 x Ceramic Travel Mug at $22.00 plus 1 x Summit Insulated Bottle at $28.00. The engine takes $6.90 off, and checkout charges $50.00 plus $0.00 delivery.
- What will I have to check before publishing?
- Confirm which products this applies to. We could not read product targeting from the script. This discounts every shipping rate at checkout, not one named rate.
Related Script shapes
A share taken off every delivery rate at checkout.
A flat sum off the delivery charge, floored at free.
Every delivery rate rewritten to one price rather than reduced by an amount.
Paste your Script and see it rebuilt
The rebuild is checked against the money your old Script charged before you can publish it.