arvel 0.9.3

The Laravel of Python — FastAPI + Pydantic + SQLAlchemy, end-to-end type-safe.

arvel

The Laravel of Python — built natively on FastAPI + Pydantic + SQLAlchemy, end-to-end type-safe.

Status: Pre-alpha. The public API can still change before 1.0.

Arvel is a batteries-included application framework for async Python. It layers a service container, typed configuration, an Eloquent-style ORM (Arvent), an HTTP stack (routing, form requests, API resources, middleware), cache, sessions, storage, queues, events, broadcasting, mail, notifications, scheduling, and auth on top of the standard async stack — without replacing FastAPI, Pydantic, or SQLAlchemy.

Full documentation lives at arvel.dev.

Install

pip install arvel
# with extras:
pip install 'arvel[postgres,redis,queue]'

Arvel requires Python 3.14+.

Hello, Arvel

The framework boots through an Application. You register configuration and service providers, then resolve services from the container:

from pathlib import Path

from arvel import Application, ServiceProvider
from arvel.config import ArvelSettings


class AppSettings(ArvelSettings):
    name: str = "MyApp"
    debug: bool = False


class Greeter:
    def __init__(self, settings: AppSettings) -> None:
        self.settings = settings

    def greet(self, who: str) -> str:
        prefix = "DEBUG: " if self.settings.debug else ""
        return f"{prefix}Hello from {self.settings.name}, {who}!"


class GreeterProvider(ServiceProvider):
    def register(self) -> None:
        self.app.container.singleton(Greeter)


async def main() -> None:
    app = (
        Application.configure(Path("."))
        .with_environment("production")
        .with_config_files([AppSettings])
        .with_providers([GreeterProvider])
        .create()
    )
    await app.boot()

    greeter = app.container.make(Greeter)
    print(greeter.greet("Arvel"))

    await app.shutdown()

In a generated project you don't write this by hand — arvel new scaffolds bootstrap/app.py and bootstrap/providers.py, and arvel serve runs the ASGI app for you.

What's inside

Area	Highlights
Container & providers	Constructor injection, singletons, contextual bindings, dep() for FastAPI Depends
Config	ArvelSettings (pydantic-settings), @register, Config.of(...), the config() helper
HTTP	Route decorators, FormRequest validation, JsonResource/ResourceCollection, middleware
Arvent ORM	Model, typed relations, soft deletes, scopes, attribute casts, a schema DSL → Alembic
Auth	JWT / session / token guards, Gate and policies, password resets, email verification
Queues	Job, the Bus facade, retries with backoff, dead-letter queue, graceful workers
Events	Typed Event models, inline and ShouldQueue listeners, the Event facade
Mail & notifications	Mailables (envelope/content), SMTP/log/array drivers, multi-channel notifications
Cache / session / storage	Pluggable drivers behind Cache, Session, and Storage facades
Scheduling & broadcasting	Cron-style scheduler, Reverb-compatible WebSocket server

CLI

Installing the package puts the arvel binary on your PATH. A few common commands:

arvel new my-app           # scaffold a project
arvel serve --reload       # run the ASGI dev server
arvel make:model Post -m   # generate a model + migration
arvel migrate              # run pending migrations
arvel queue:work           # process queued jobs
arvel schedule:work        # run the scheduler
arvel route:list           # inspect registered routes
arvel about                # show framework + environment info

Run arvel --help for the full list.

License

MIT — see LICENSE.