A Backend for E-commerce — Products, Orders, and Auth on PostgreSQL
E-commerce is relational by nature — products, variants, carts, orders, and customers all reference each other. Kolaybase gives you PostgreSQL with transactions and constraints, so your catalog and checkout stay consistent, plus auth and an API for the storefront.
Transactional checkout
Use PostgreSQL transactions so an order and its line items either all commit or all roll back — no half-written carts.
Relational catalog
Model products, variants, categories, and inventory with real foreign keys and constraints instead of fragile denormalized documents.
Customer accounts built in
Email and OAuth sign-in for shoppers, with row-level security so customers only see their own orders.
Fast storefront queries
Filter, sort, and paginate the catalog over the REST API, and embed related data like variants in a single request.
Place an order atomically
begin;
insert into orders (customer_id, total)
values (auth.uid(), 49.90) returning id;
insert into order_items (order_id, product_id, qty)
values (currval('orders_id_seq'), 'sku_123', 2);
commit;Frequently asked questions
- Can Kolaybase handle inventory and orders consistently?
- Yes. PostgreSQL transactions and constraints keep orders, line items, and inventory consistent, which is hard to guarantee on a document database.
- How do customers only see their own orders?
- Enable row-level security and write a policy keyed on the authenticated customer, so the REST API only ever returns that customer's orders.
More use cases
Start building today
A complete backend for your e-commerce — running in minutes.