arvel 0.19.3

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, the Arvent ORM, 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.