The only limit driven by product data rather than a list you maintain in the app — and the only one that can lock the quantity picker on your storefront.
Before you start
- The Premium plan.
- The app embed enabled — see install.
- A plan for setting the metafield across your products, in bulk.
The three metafield types
| Type | Effect |
|---|---|
multiple_of | Quantity steps in your case size — 6, 12, 18 |
min_quantity | Floor for that product |
max_quantity | Ceiling for that product |
Steps
1. Install Nex Validator
Search Nex Validator in the Shopify App Store, or use the button below. Approve the permissions and the app appears in your admin under Apps. There is a free trial, and it works on every Shopify plan.
2. Set the rule metafield on your products with the type and value you need. Shopify’s bulk editor or a CSV import handles this far faster than one at a time.
Screenshot coming soon
The rule metafield set across products in Shopify's bulk editor
3. In the app, create or open a rule and enable Allow bulk limit.
Screenshot coming soon
The Allow bulk limit toggle switched on in the rule form
4. Set Status to Enabled and save.
Verify it worked
- On a product page, the quantity picker steps in your multiple, or refuses to go below the minimum.
- At checkout, a cart that breaks the rule is blocked.
- A product without the metafield behaves normally.
Test both layers. The storefront lock and the checkout block are independent, and it is common for one to work while the other does not.
Common setups
| Goal | Metafield |
|---|---|
| Sell in cases of 12 | multiple_of = 12 |
| Wholesale floor across a catalogue | min_quantity per product |
| Cap a rationed range | max_quantity per product |
| Mixed rules across many products | Different values per product |