[Initial] Integrate FastAPI into the Project

[mehalyna]

Task: Integrate FastAPI into the Project

Add FastAPI as a component within project to enhance API performance and support asynchronous operations.

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Instructions:

1. Install Dependencies
   Install FastAPI and Uvicorn:

   pip install fastapi uvicorn

2. Create FastAPI App

   • Inside your Django project, create a new directory called fastapi_app.
   • Inside fastapi_app/, create __init__.py and main.py.

   main.py example:

   from fastapi import FastAPI
   
   app = FastAPI()
   
   @app.get("/hello")
   async def hello():
       return {"message": "Hello from FastAPI"}

3. Run FastAPI Locally (for testing)
   In the terminal, navigate to the Django project directory and run:

   uvicorn fastapi_app.main:app --reload --port 8001

4. Configure ASGI Application
   Modify your Django project’s asgi.py to include FastAPI routing:

   import os
   from django.core.asgi import get_asgi_application
   from fastapi_app.main import app as fastapi_app
   from django.urls import path
   from django.conf.urls import re_path
   
   django_asgi_app = get_asgi_application()
   
   from fastapi.middleware.asgi import ASGIApp
   
   application = ASGIApp(
       app=django_asgi_app,
       lifespan=None,
       sub_apps=[("/api/fastapi", fastapi_app)],
   )

5. Update urls.py
   Modify Django’s urls.py to include FastAPI routes:

   from django.urls import path, include
   
   urlpatterns = [
       path('admin/', admin.site.urls),
       path('api/fastapi/', include('fastapi_app.main')),
   ]

6. Add FastAPI Tests
   Use httpx for testing FastAPI routes. Add the following to your tests:

   import httpx
   import pytest
   
   @pytest.mark.asyncio
   async def test_hello():
       async with httpx.AsyncClient() as client:
           response = await client.get("http://localhost:8001/hello")
           assert response.status_code == 200
           assert response.json() == {"message": "Hello from FastAPI"}

7. Update Dependencies
   Make sure your Django project requirements reflect the new additions:

   pip freeze > requirements.txt

8. Configure Deployment
   Update your docker-compose.yml or deployment files to include Uvicorn alongside Django.

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Deliverables:

• Working FastAPI endpoint at /api/fastapi/hello.
• ASGI integration with Django.
• Unit test to verify the FastAPI route.