rapyer 1.2.6

Pydantic models with Redis as the backend

Rapyer

Redis Atomic Pydantic Engine Reactor

An async Redis ORM that provides atomic operations for complex data models

📚 Full Documentation | Installation | Examples | API Reference

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What is Rapyer?

Rapyer (Redis Atomic Pydantic Engine Reactor) is a modern async Redis ORM that enables atomic operations on complex data models. Built with Pydantic v2, it provides type-safe Redis interactions while maintaining data consistency and preventing race conditions.

Key Features

🚀 Atomic Operations - Built-in atomic updates for complex Redis data structures
⚡ Async/Await - Full asyncio support for high-performance applications
🔒 Type Safety - Complete type validation using Pydantic v2
🌐 Universal Types - Native optimization for primitives, automatic serialization for complex types
🔄 Race Condition Safe - Lock context managers and pipeline operations
📦 Redis JSON - Efficient storage using Redis JSON with support for nested structures

Installation

pip install rapyer

Requirements:

• Python 3.10+
• Redis server with JSON module
• Pydantic v2

Quick Start

import asyncio
from rapyer.base import AtomicRedisModel
from typing import List, Dict


class User(AtomicRedisModel):
    name: str
    age: int
    tags: List[str] = []
    metadata: Dict[str, str] = {}


async def main():
    # Create and save a user
    user = User(name="John", age=30)
    await user.asave()

    # Atomic operations that prevent race conditions
    await user.tags.aappend("python")
    await user.tags.aextend(["redis", "pydantic"])
    await user.metadata.aupdate(role="developer", level="senior")

    # Load user from Redis
    loaded_user = await User.aget(user.key)
    print(f"User: {loaded_user.name}, Tags: {loaded_user.tags}")

    # Atomic operations with locks for complex updates
    async with user.alock("update_profile") as locked_user:
        locked_user.age += 1
        await locked_user.tags.aappend("experienced")
        # Changes saved atomically when context exits


if __name__ == "__main__":
    asyncio.run(main())

Core Concepts

Atomic Operations

Rapyer ensures data consistency with built-in atomic operations:

# These operations are atomic and race-condition safe
await user.tags.aappend("python")           # Add to list
await user.metadata.aupdate(role="dev")     # Update dict
await user.score.set(100)                   # Set value

Lock Context Manager

For complex multi-field updates:

async with user.alock("transaction") as locked_user:
    locked_user.balance -= 50
    locked_user.transaction_count += 1
    # All changes saved atomically

Pipeline Operations

Batch multiple operations for performance:

async with user.apipeline() as pipelined_user:
    await pipelined_user.tags.aappend("redis")
    await pipelined_user.metadata.aupdate(level="senior")
    # Executed as single atomic transaction

Type Support

Rapyer supports all Python types with automatic serialization:

• Native types (str, int, List, Dict) - Optimized Redis operations
• Complex types (dataclass, Enum, Union) - Automatic pickle serialization
• Nested models - Full Redis functionality preserved

from dataclasses import dataclass
from enum import Enum

@dataclass
class Config:
    debug: bool = False

class User(AtomicRedisModel):
    name: str = "default"
    scores: List[int] = []
    config: Config = Config()  # Auto-serialized
    
# All types work identically
user = User()
await user.config.set(Config(debug=True))  # Automatic serialization
await user.scores.aappend(95)               # Native Redis operation

Why Choose Rapyer?

Comparison with Other Redis ORMs

Feature	Rapyer	Redis OM	pydantic-redis	orredis
🚀 Atomic Operations	✅ Built-in for all operations	❌ Manual transactions only	❌ Manual transactions only	❌ Manual transactions only
🔒 Lock Context Manager	✅ Automatic with async with model.alock()	❌ Manual implementation required	❌ Manual implementation required	❌ Manual implementation required
⚡ Pipeline Operations	✅ True atomic batching with model.apipeline()	⚠️ Basic pipeline support	❌ No pipeline support	❌ No pipeline support
🌐 Universal Type Support	✅ Native + automatic serialization for any type	⚠️ HashModel vs JsonModel limitations	⚠️ Limited complex types	⚠️ Limited complex types
🔄 Race Condition Safe	✅ Built-in prevention with Lua scripts	❌ Manual implementation required	❌ Manual implementation required	❌ Manual implementation required
📦 Redis JSON Native	✅ Optimized JSON operations	✅ Via JsonModel only	❌ Hash-based	❌ Hash-based
⚙️ Pydantic v2 Support	✅ Full compatibility	✅ Recent support	⚠️ Limited support	⚠️ Basic support
🎯 Type Safety	✅ Complete validation	✅ Good validation	✅ Good validation	⚠️ Basic validation
⚡ Performance	✅ Optimized operations	✅ Good performance	✅ Standard	✅ Rust-optimized
🔧 Nested Model Support	✅ Full Redis functionality preserved	⚠️ Limited nesting	✅ Advanced relationships	⚠️ Basic support
🎛️ Custom Primary Keys	✅ Field annotations	❌ ULIDs only	✅ Custom fields	✅ Custom fields
🧪 Extensive Test Coverage	✅ 100%+ comprehensive tests with CI	⚠️ Basic testing with CI	⚠️ Limited test coverage	⚠️ Basic test suite

🏆 What Makes Rapyer Unique

True Atomic Operations Out of the Box

# Rapyer - Atomic by default
await user.tags.aappend("python")  # Race-condition safe
await user.metadata.aupdate(role="dev")  # Always atomic

# Others - Manual transaction management required
async with redis.apipeline() as pipe:  # Manual setup
    pipe.multi()  # Manual transaction
    # ... manual Redis commands               # Error-prone
    await pipe.execute()

Intelligent Lock Management

# Rapyer - Automatic lock context
async with user.alock("profile_update") as locked_user:
    locked_user.balance -= 50
    locked_user.transaction_count += 1
    # All changes saved atomically on exit

# Others - Manual lock implementation
lock_key = f"lock:{user.key}"
while not await redis.set(lock_key, token, nx=True):  # Manual retry logic
    await asyncio.sleep(0.1)  # Race conditions possible
# ... manual cleanup required

Universal Type System

# Rapyer - Any Python type works identically
class User(AtomicRedisModel):
    scores: List[int] = []              # Native Redis operations
    config: MyDataClass = MyDataClass()  # Auto-serialized
    metadata: Dict[str, Any] = {}       # Native Redis operations

# All types support the same atomic operations
await user.config.set(new_config)      # Automatic serialization
await user.scores.aappend(95)           # Native Redis LIST operations
await user.metadata.aupdate(key="val") # Native Redis JSON operations

Pipeline with True Atomicity

# Rapyer - Everything in pipeline is atomic
async with user.apipeline() as pipelined_user:
    await pipelined_user.tags.aappend("redis")
    await pipelined_user.metadata.aupdate(level="senior")
    # Single atomic transaction - either all succeed or all fail

# Others - No built-in pipeline abstraction for ORM operations

Learn More

• 📖 Documentation - Complete guide and API reference
• 🗺️ Roadmap - Future features and development plans

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Contributing

Contributions are welcome! Please feel free to submit a Pull Request. Thanks for @Mizaro and @oazmiry this would not have been possible without you.

License

MIT License