Registry / web-framework / fastapi-injector

fastapi-injector

library0.9.0pypypiunverified

Integrates python-injector with FastAPI for dependency injection. Current version: 0.9.0. Supports Python 3.10+. Releases are infrequent; last release 2023.

web-framework serialization testing

pip install fastapi-injector

package ↗

INSTALL

IMPORT

SIG · FASTAPI-INJECTOR

fastapi-injector

web-frameworkpythonv0.9.0

Install

1.7s avg

Import

—

Disk

16MB

Pass rate

10/ 10

Env Coverage10 / 10

glibc

3.9–3.13

musl

3.9–3.13

Install & Compatibility

Where this runs

tested against v0.9.0 · pip install

no network on importno background threads

Install × environment matrix

Each cell = how many times install + import succeeded across repeated harness runs. Partial = flaky.
glibc = Debian/Ubuntu slim · musl = Alpine Linux

musl

py 3.10–3.95 runs

installs and imports cleanly · install 0.0s · import 0.000s · 18MB

glibc

py 3.10–3.95 runs

installs and imports cleanly · install 1.7s · import 0.000s · 18MB

16MB installed

● package 16MB

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

FastAPIInjector

✓ from fastapi_injector import FastAPIInjector

✗ from fastapi_injector import FastAPIInjector

Basic FastAPI app with injector module binding and route injection.

from fastapi import FastAPI, APIRouter from fastapi_injector import FastAPIInjector, Injected, request_injector from injector import Module, singleton, inject class MyModule(Module): def configure(self, binder): binder.bind(str, to='Hello, World!', scope=singleton) app = FastAPI() injector = FastAPIInjector(app, modules=[MyModule()]) @router.get('/') async def root(greeting: str = Injected(str)) -> dict: return {'message': greeting} app.include_router(router) if __name__ == '__main__': import uvicorn uvicorn.run(app)

Debug

Known issues

gotcha`request_injector` is a property on the app instance, not a standalone import. It must be accessed via `app.state.injector` or `request_injector` only inside a request context when using `AttachInjector` middleware.

fix

Use `from fastapi_injector import request_injector` and then `request_injector.get(SomeClass)` only within a request handler after calling `injector.attach_injector(app)`.

affects: 0.9.0

deprecatedThe `Injected` type hint from fastapi_injector is deprecated in favor of using `Depends` with a provider from injector. The direct use of `Injected` may be removed in future versions.

fix

Instead of `param: SomeClass = Injected(SomeClass)`, define a dependency function using `Depends` that gets the value from the injector's container.

affects: 0.9.0

breakingIn version 0.9.0, the `FastAPIInjector` class no longer automatically attaches the injector to the app's state. You must explicitly call `attach_injector()` method on the `FastAPIInjector` instance after creation.

fix

After creating `injector = FastAPIInjector(app, modules=[...])`, call `injector.attach_injector()` before the first request.

affects: 0.9.0

Upgrade

Version history

0.9.0latest on PyPI · released Oct 10, 2025

Audit

Dependencies

fastapirequiredRequired framework

injectorrequiredCore DI library

Agent activity

21 hits · last 30 days

node

Resources

packagehttps://pypi.org/project/fastapi-injector/ ↗