PocketBase

Overview

PocketBase is an open-source backend packaged as a single binary, providing an embedded SQLite database, real-time subscriptions, file storage, and built-in authentication. It auto-generates REST APIs for collections and is ideal for shipping full-stack applications with minimal infrastructure complexity.

Instructions

• When defining collections, choose the appropriate type: base collections for standard CRUD, auth collections for user management with email/password and OAuth2, and view collections for read-only SQL-backed queries.
• When building client integrations, use the JavaScript/TypeScript SDK with pb.collection("name").getList() for queries, .subscribe() for real-time updates, and expand parameter for fetching related data in a single request.
• When configuring permissions, set API rules on every collection (listRule, viewRule, createRule, updateRule, deleteRule) using filter syntax like @request.auth.id = user.id for row-level security.
• When extending functionality, add JavaScript hooks (onBeforeCreateRecord, onAfterUpdateRecord) for business logic, custom routes with routerAdd(), and cron jobs with cronAdd().
• When deploying, run the single binary with ./pocketbase serve, mount pb_data/ as a Docker volume, and use Caddy or Nginx for HTTPS termination.
• When backing up, copy the pb_data/ directory or use the built-in backup API before running migrations.
• When scaling, note that SQLite handles approximately 50,000 concurrent reads; for write-heavy workloads exceeding 100K daily active users, consider PostgreSQL alternatives.

Examples

Example 1: Build an MVP backend with authentication

User request: "Set up a PocketBase backend with user auth and a posts collection"

Actions:

1. Create an auth collection for users with email/password and Google OAuth2
2. Create a posts collection with title, body, and relation to users
3. Set API rules: anyone can list/view, only authenticated authors can create/update/delete their own posts
4. Configure the JS SDK for client-side CRUD and auth flows

Output: A fully functional backend with auth, permissions, and auto-generated REST API.

Example 2: Add real-time features

User request: "Enable live updates for a chat application using PocketBase"

Actions:

1. Create a messages collection with text, sender relation, and room field
2. Set up SSE subscription with pb.collection("messages").subscribe("*", callback)
3. Configure API rules for room-based access control
4. Handle client auto-reconnect with exponential backoff

Output: A real-time chat backend with live message delivery via Server-Sent Events.

Guidelines

• Always set API rules on every collection; default is admin-only (null), which breaks client access.
• Use expand parameter instead of multiple API calls for related data.
• Validate inputs in hooks (onBeforeCreateRecord) for business logic beyond schema validation.
• Back up pb_data/ before migrations since SQLite migrations are irreversible.
• Use view collections for complex queries instead of client-side joins.
• Keep hooks lightweight; heavy processing should run async or in cron jobs.