redis-js

# Upstash Redis SDK - Complete Skills Guide This directory contains comprehensive guides for using the `@upstash/redis` SDK. These skill files are designed to help developers and AI assistants understand and use the SDK effectively. ## Installation ```bash npm install @upstash/redis ``` ## Quick Start ### Basic Initialization ```typescript import { Redis } from "@upstash/redis"; // Initialize with explicit credentials const redis = new Redis({ url: "UPSTASH_REDIS_REST_URL", token: "UPSTASH_REDIS_REST_TOKEN", }); // Or initialize from environment variables const redis = Redis.fromEnv(); ``` ### Environment Variables Set these in your `.env` file: ```bash UPSTASH_REDIS_REST_URL=https://your-redis.upstash.io UPSTASH_REDIS_REST_TOKEN=your-token-here ``` ## Skill Files Overview ### Data Structures (skills/data-structures/) Redis data types with auto-serialization examples: - **strings.md** - GET, SET, INCR, DECR, APPEND with automatic type handling - **hashes.md** - HSET, HGET, HMGET with object serialization - **lists.md** - LPUSH, RPUSH, LRANGE with array handling - **sets.md** - SADD, SMEMBERS, set operations - **sorted-sets.md** - ZADD, ZRANGE, ZRANK, leaderboard patterns - **json.md** - JSON.SET, JSON.GET, JSONPath queries for nested objects - **streams.md** - XADD, XREAD, XGROUP, consumer groups - **arrays.md** - ARSET, ARINSERT, ARSCAN, ARGREP, AROP, ring buffers with ARRING on sparse index-addressed arrays - **vector-indexes.md** - VECTOR.CREATE, VECTOR.ADD, VECTOR.QUERY nearest-neighbour search inside Redis via redis.vector ### Advanced Features (skills/advanced-features/) Complex operations and optimizations: - **auto-pipeline.md** - Automatic request batching, performance optimization - **pipeline-and-transactions.md** - Manual pipelines, MULTI/EXEC, WATCH for atomic operations - **scripting.md** - Lua scripts, EVAL, EVALSHA for server-side logic ### Patterns (skills/patterns/) Common use cases and architectural patterns: - **caching.md** - Cache-aside, write-through, TTL strategies - **rate-limiting.md** - Integration with @upstash/ratelimit package - **session-management.md** - Session storage and user state management - **distributed-locks.md** - Lock implementations, deadlock prevention - **leaderboard.md** - Sorted set leaderboards, real-time rankings ### Performance (skills/performance/) Optimization techniques and best practices: - **batching-operations.md** - MGET, MSET, batch operations - **pipeline-optimization.md** - When to use pipelines, performance tips - **ttl-expiration.md** - Key expiration strategies, memory management - **data-serialization.md** - Deep dive into auto serialization, custom serializers, edge cases - **error-handling.md** - Error types, retry strategies, timeout handling, debugging tips - **redis-replicas.md** - Global database setup, read replicas, read-your-writes consistency ### Search (skills/search/) Full-text search, filtering, and aggregation extension for Redis: - **overview.md** - Schema definition, field types, pitfalls, package overview - **commands/querying.md** - Query and count with filters, pagination, sorting, highlighting - **commands/aggregating.md** - Metric aggregations ($avg, $sum, $stats), bucket aggregations ($terms, $range, $histogram, $facet) - **commands/index-management.md** - Create, describe, drop indexes, waitIndexing - **commands/aliases.md** - Index aliases for zero-downtime reindexing - **adapters.md** - Using search with node-redis and ioredis via @upstash/search-redis and @upstash/search-ioredis ### Migrations (skills/migrations/) Migration guides from other libraries: - **from-ioredis.md** - Migration from ioredis, key differences, serialization changes - **from-redis-node.md** - Migration from node-redis, API differences ## Common Mistakes (Especially for LLMs) ### ❌ Mistake 1: Treating Everything as Strings ```typescript // ❌ WRONG - Don't do this with @upstash/redis await redis.set("count", "42"); // Stored as string "42" const count = await redis.get("count"); const incremented = parseInt(count) + 1; // Manual parsing needed // ✅ CORRECT - Let the SDK handle it await redis.set("count", 42); // Stored as number const count = await redis.get("count"); const incremented = count + 1; // Just use it ``` ### ❌ Mistake 2: Manual JSON Serialization ```typescript // ❌ WRONG - Unnecessary with @upstash/redis await redis.set("user", JSON.stringify({ name: "Alice" })); const user = JSON.parse(await redis.get("user")); // ✅ CORRECT - Automatic handling await redis.set("user", { name: "Alice" }); const user = await redis.get("user"); ``` ## Quick Command Reference ```typescript // Strings await redis.set("key", "value"); await redis.get("key"); await redis.incr("counter"); await redis.decr("counter"); // Hashes await redis.hset("user:1", { name: "Alice", age: 30 }); await redis.hget("user:1", "name"); await redis.hgetall("user:1"); // Lists await redis.lpush("tasks", "task1", "task2"); await redis.rpush("tasks", "task3"); await redis.lrange("tasks", 0, -1); // Sets await redis.sadd("tags", "javascript", "redis"); await redis.smembers("tags"); // Sorted Sets await redis.zadd("leaderboard", { score: 100, member: "player1" }); await redis.zrange("leaderboard", 0, -1); // JSON await redis.json.set("user:1", "$", { name: "Alice", address: { city: "NYC" } }); await redis.json.get("user:1"); // Expiration await redis.setex("session", 3600, { userId: "123" }); await redis.expire("key", 60); await redis.ttl("key"); ``` ## Best Practices 1. **Use environment variables** for credentials, never hardcode 2. **Leverage auto-serialization** - pass native JavaScript types 3. **Use TypeScript types** for better type safety 4. **Set appropriate TTLs** to manage memory 5. **Use pipelines** for multiple operations 6. **Namespace your keys** (e.g., `user:123`, `session:abc`) ## Resources - [Official Documentation](https://upstash.com/docs/redis) - [GitHub Repository](https://github.com/upstash/redis-js) - [API Reference](https://upstash.com/docs/redis/sdks/ts/overview) - [Examples](https://github.com/upstash/redis-js/tree/main/examples) ## Getting Help For detailed information on specific topics, refer to the individual skill files in the `skills/` directory. Each file contains comprehensive examples, use cases, and best practices for its topic.