@quatrain/backend-postgres

A backend adapter for PostgreSQL. This package is optimized for use with Supabase but works with any standard PostgreSQL database.

Features

• Implements the @quatrain/backend abstract adapter.
• Full SQL support for complex queries, transactions, and joins.
• Uses the pg (node-postgres) library for high performance.
• Includes scripts and guidance for setting up the required database schema.

Installation

npm install @quatrain/backend-postgres pg
Copy

Usage

import { Backend } from '@quatrain/backend'
import { PostgresAdapter } from '@quatrain/backend-postgres'

const adapter = new PostgresAdapter({ config: { connectionString: '...' } })
Backend.addAdapter(adapter, 'default', true)
Copy

Timezone Handling

All TIMESTAMP WITHOUT TIME ZONE values are interpreted as UTC. The adapter configures the pg driver's type parsers to return timestamps as ISO8601 strings with the Z suffix, ensuring consistent timezone handling regardless of the server's local timezone.

This means:

• Timestamps stored in the database (e.g., 2026-02-06 08:24:06.034) are treated as UTC
• The adapter returns them as 2026-02-06T08:24:06.034Z for proper parsing
• Frontend applications can then convert to the user's local timezone for display

Documentation

For concrete examples and usage guides, please refer to the How-To Guide.

License

AGPL-3.0-only