django-lifecycle-hooks 1.0.2

A next-generation, high-performance declarative lifecycle hooks library for Django 5.x+

Django Lifecycle Hooks

The high-performance, zero-overhead alternative to Django Signals.

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⚡ Why this library?

Stop slowing down your Django app with inefficient signals.

Most lifecycle libraries (and Django's own signals) rely on heavy runtime introspection, full object copying, and loose coupling that makes debugging a nightmare.

Django Lifecycle Hooks is engineered for performance-critical applications:

• 🚀 Zero Runtime Overhead: Hook resolution happens once at import time. Executing hooks is an O(1) operation.
• ⚡ First-Class Async & ASGI Support: The only lifecycle library with native asave and acreate support. We don't just wrap sync code; we await your async hooks properly.
• 💾 Sparse Snapshotting: We don't copy your entire model. If you only watch status, we only cache status. Your memory usage stays flat.
• 🛡️ Type-Safe & Modern: Built for Python 3.14+ and Django 5.2+. Fully typed, __slots__ optimized, and ready for strict MyPy validation.
• ✨ Developer Joy: No more hunting for @receiver in random files. Logic lives where it belongs: inside your model or specialized hooks.

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🏎️ Performance Comparison

Feature	Standard Signals / Legacy Libs	Django Lifecycle Hooks
Hook Resolution	Runtime Introspection (Slow)	Import-time Registry (Instant)
Change Detection	Full __dict__ copy (High RAM)	Sparse Field Copy (Low RAM)
Lookup Speed	O(n) Listener Loop	O(1) Direct Dispatch
Async / ASGI	❌ None or Hacky Wrappers	✅ Native asave & acreate Support

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🚀 Quick Start

1. Install

pip install django-lifecycle-hooks

2. Write Elegant Code

Inherit from LifecycleModelMixin and declare your logic.

from django.db import models
from django_lifecycle_hooks import LifecycleModelMixin, hook, HookType

class UserAccount(LifecycleModelMixin, models.Model):
    username = models.CharField(max_length=100)
    status = models.CharField(max_length=20, default="active")
    
    # ✅ 1. Simple & Fast
    @hook(HookType.BEFORE_SAVE)
    def clean_username(self):
        self.username = self.username.lower()

    # ✅ 2. Conditional & Declarative
    # Only runs when status changes to 'banned'. 
    # No "if" checks needed inside your method.
    @hook(HookType.AFTER_UPDATE, when="status", was="active", is_now="banned")
    def on_ban(self):
        self.ban_related_assets()

    # ✅ 3. Transaction Safe
    # Only fires after the DB transaction commits successfully.
    @hook(HookType.AFTER_SAVE, on_commit=True)
    def send_welcome_email(self):
        send_email_task.delay(self.id)

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📚 Documentation

• Documentation: Master advanced patterns (Async, Stacked Hooks, Conditions).

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Built for engineers who care about speed, clean code, and type safety ♥️