Restaurants: inventory manager using Next.js

Summary

A inventory manager blueprint for restaurants built with Next.js on Ample. Domain schema: menu_items (sku, name, section, price, allergens, active): the menu as a SKU catalog; stock_movements (sku, delta, reason, moved_at): ingredient and prepared-item stock; orders (order_no, service_type, status, placed_at): dine-in, pickup and delivery orders; order_lines (order_no, sku, qty, modifiers): order contents; events (seq, record_type, record_id, kind, at): application-owned history written in the same transaction. Public information: menu with allergens and prices, locations, hours and reservations contact, catering information. Kept out of scope until handling is reviewed: customer contact and payment details, staff schedules. Allergen information must be kept accurate by the operator; nothing here validates food-safety claims. Technical basis verified on Next.js: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected).

Infrastructure requirements

• Compute: verified (Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.)
• Postgres: verified (Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.)
• S3-compatible object storage: verified (Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.)

Prerequisites

• A Next.js project (next build then next start -H 0.0.0.0 -p $PORT on the node-22 template)
• A PostgreSQL driver reading DATABASE_URL (auto-provisioned when omitted)
• Bucket credentials from ample bucket create passed as encrypted S3_* environment variables
• A review of which restaurants data classes may be handled at all; this blueprint models public information only

Exact tested configuration

• template: node-22
• runtime: node
• size: s-1vcpu-1gb
• install: npm install
• build: npm run build --if-present
• start: npm run start

Steps

1. Model the restaurants domain. Create the tables menu_items, stock_movements, orders, order_lines, events. The menu as a sku catalog lives in menu_items; keep the sensitive classes (customer contact and payment details, staff schedules) out of this schema.

2. Workflow step 1. Model SKUs and stock movements; derive stock from movements

3. Workflow step 2. Apply movements transactionally with an optimistic version check on the SKU

4. Workflow step 3. Record an event per movement for history

5. Workflow step 4. Deploy and verify history and rejected stale updates

6. Deploy. Run the synchronous deploy once and read the result. Re-running with no change is a no-op.

   ample deploy . --name <app-name> --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...
   

7. Verify. Run the pattern self-test(s) from the example (/p/transactional-workflows) and your own acceptance checks for the restaurants workflow.

   ample logs <deployment_id> --kind build
   

Tested examples

• Next.js pattern fixture (tests/deploy-canaries/next-js-patterns): Verified transactional workflows basis for this blueprint.

Success checks

• app responds on its public URL (/ on the live URL, expect ample canary next js patterns)
• transactional-workflows self-test from the example (/p/transactional-workflows on the live URL, expect see the pattern fixture checks)

Limitations

• The technical basis (transactional workflows on Next.js) was verified with the pattern fixture; the restaurants schema and workflow are an original design for this blueprint and were not executed as a separate application.
• No health, financial, privacy or other compliance claim is made. Allergen information must be kept accurate by the operator; nothing here validates food-safety claims.
• Public content and synthetic examples only until actual data-handling requirements have been reviewed.
• Verified on the node-22 template at s-1vcpu-1gb; region, request-duration limits and other sizes are unknown or unverified.
• Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified.
• PutObject and GetObject with path-style addressing are verified; other S3 operations and CDN cache rules are not.