Adding a Checkout Rule
Requires: Free plan
Why this matters
Limit messages on the product page and cart are friendly nudges. A determined shopper can still bypass them — for example, by visiting /checkout from a saved link, sharing a cart URL, or ignoring the warnings. The checkout rule closes that back door by re-running the validation at the final step.
By setting this up, you protect your store from unexpected bulk purchases, avoid shipping complications, and keep your inventory balanced.
Part 1: Register the validation in Shopify Admin
Step 1: Open Checkout rules in Shopify
In your Shopify admin, navigate to Settings → Checkout → Checkout rules and click Add rule.
Step 2: Select Avada Order Limit's validation
In the dropdown, choose Avada Order Limit → avada-order-limit-validation. This connects the Shopify checkout step to Avada's validation function.
Step 3: Turn on the checkout rule
After saving in Shopify, make sure the new rule is enabled — toggle the switch next to the rule you just added.
Part 2: Configure the rule inside Avada Order Limit
Once Shopify is registered, jump back into the Avada app to control how the validation behaves.
Open Avada Order Limit and navigate to Settings → Checkout rules.
The page is titled Settings and contains three cards: Checkout validation, Rule settings, and Debug mode.
Step 4: Turn on Checkout validation
In the Checkout validation card, look at the Checkout rules status badge:
- If it reads Off, click Turn on — the badge flips to On (green) and the validation is active.
- If it reads On, you're already covered.
Step 5: Pick what happens if validation fails
Shopify's checkout rules can occasionally fail to execute (network blips, function timeouts, etc.). The Rule settings card lets you decide the fallback behavior. Under If the checkout validation fails or experiences a problem, choose one:
- Allow customer to complete the checkout — the app keeps working normally before checkout, but if a customer reaches checkout (e.g., via a direct link) the rules are not enforced and the order proceeds. Recommended for most stores.
- Block customer from completing the checkout — all orders are blocked as if a limit rule were violated. Safer for inventory but may stop legitimate orders during a function outage.
Tip: Pick Allow customer to complete the checkout unless you have strict inventory rules. A short outage of Shopify's checkout function is rare, but blocking every order during one will hurt revenue.
After choosing, click Save in the top bar to apply.
Step 6: (Optional) Share function logs for debugging
The Debug mode card is for troubleshooting. If something looks wrong — for example, a limit isn't enforced at checkout — our support team may ask you to share the checkout function's logs.
- Click Share logs on the right side of the Debug mode card.
- This opens the Shopify Apps page for Avada Order Limit.
- Click the action button (...) next to Avada Order Limit: Checkout Rules.
- Choose View details.
- Scroll down to Share function logs and click Share logs.
- Once sharing is enabled, share the logs URL with our support team.
Step 7: Verify end-to-end
Open your storefront in an incognito window and try to violate a limit at checkout:
- Add a quantity that exceeds your limit rule.
- Skip the cart and go to
/checkoutdirectly (paste the URL if needed). - The checkout should be blocked with a clear limit message.
If the order goes through anyway, recheck Part 1 (the rule must be added and enabled in Shopify) and Part 2 Step 4 (Checkout rules status must read On in the app).
Tips
- Both halves are required: Registering the validation in Shopify (Part 1) without turning it on in the app (Part 2 Step 4) won't enforce anything — and vice versa.
- Allow vs. Block trade-off: "Allow" optimizes for smooth checkout; "Block" optimizes for strict inventory control. Pick based on which failure mode hurts your store more.
- Logs are scoped per request: Function logs are short-lived. If a customer reports an issue, grab the logs as soon as possible after the failed checkout.
- No code editing needed: Unlike the legacy snippet flow, the checkout rule is fully managed by Shopify Functions — there's nothing to paste into your theme.