Is it possible to use FastAPI with Django?

Short Answer

Yes it’s possible with WSGIMiddleware.

For example, you can use all Django features (yes admin too) with mounting, with this example code.

import os
from importlib.util import find_spec

from configurations.wsgi import get_wsgi_application
from fastapi import FastAPI
from fastapi.middleware.wsgi import WSGIMiddleware
from fastapi.staticfiles import StaticFiles

from api import router

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "myapp.settings")
os.environ.setdefault("DJANGO_CONFIGURATIN", "Localdev")

application = get_wsgi_application()

app = FastAPI()
app.mount("/admin", WSGIMiddleware(application))
app.mount("/static",
    StaticFiles(
         directory=os.path.normpath(
              os.path.join(find_spec("django.contrib.admin").origin, "..", "static")
         )
   ),
   name="static",
)

Also this one is from WSGIMiddleware documentation, it’s a more straight-forward example (This one is for Flask but it demonstrates the same idea.).

from fastapi import FastAPI
from fastapi.middleware.wsgi import WSGIMiddleware
from flask import Flask, escape, request

flask_app = Flask(__name__)


@flask_app.route("/")
def flask_main():
    name = request.args.get("name", "World")
    return f"Hello, {escape(name)} from Flask!"


app = FastAPI()


@app.get("/v2")
def read_main():
    return {"message": "Hello World"}


app.mount("/v1", WSGIMiddleware(flask_app))