Understanding useRef and forwardRef in React — A Beginner’s Guide

When working with React, you often hear about useRef and forwardRef . At first, they can feel confusing: “Why do I need refs when I already have props and state?” This article will walk you through the why, how, and when of refs in React — with simple examples, analogies, and real use cases. 1. What is useRef ? Think of useRef as a sticky note inside your component. Whatever you write on it will still be there even after React re-renders your component. function App() { const inputRef = React.useRef<HTMLInputElement>(null); const focusInput = () => { inputRef.current?.focus(); }; return ( <div> <input ref={inputRef} placeholder="Type here..." /> <button onClick={focusInput}>Focus Input</button> </div> ); } useRef creates a box that holds a reference to the <input> DOM element. inputRef.current po...
Post a Comment

Leveraging Asynchronous Views in Django REST Framework for High-Performance APIs

As web applications grow, handling a high volume of concurrent requests becomes essential. Traditional Django views, which are synchronous, can slow down the system by tying up resources for each request. Fortunately, starting with Django 3.1, asynchronous views were introduced. By leveraging async views, Django can serve more requests concurrently, improving scalability and responsiveness.

Understanding Asynchronous Views in Django

Asynchronous views allow Django to handle tasks that involve waiting, like database queries or API calls, without blocking threads. This approach allows the server to handle additional requests in the meantime. In Django, async views use the async and await keywords to enable non-blocking behavior.

Example: Fetching Data from an External API

Here’s an example of an asynchronous view in Django that fetches weather data from an external API. Instead of blocking while waiting for the API response, Django can handle other requests.


from django.http import JsonResponse
from rest_framework.views import APIView
import aiohttp

class WeatherView(APIView):
    async def get(self, request):
        city = request.query_params.get("city", "London")
        url = f"https://api.weatherapi.com/v1/current.json?key=YOUR_API_KEY&q={city}"

        async with aiohttp.ClientSession() as session:
            async with session.get(url) as response:
                data = await response.json()
                return JsonResponse(data)

How Async Requests Work with Postman

1. Making the Request

When Postman sends a request, Django receives it and uses await to pause the view while waiting for the API response, allowing other requests to be handled concurrently.

2. Handling the Response

Once the data is ready, Django resumes the paused thread, processes the response, and sends it back to Postman without losing the connection.

Conclusion

By using asynchronous views in Django, you can make your web applications more efficient and scalable. Asynchronous views allow Django to handle more concurrent requests without extra server resources, making them ideal for modern high-traffic applications.

Location: X6R8+9P4, NH503, Balsun, Himachal Pradesh 176029, India

Comments

Post a Comment

Popular posts from this blog

How to Install and Manage PostGIS with a Non-Superuser Role

Image
Prerequisite: PostgreSQL Version This guide assumes you are using PostgreSQL version 14 or later, which supports the necessary commands for PostGIS installation and management. Ensure your PostgreSQL server is up-to-date before proceeding. This guide ensures that PostGIS is installed and configured properly for a specific user, such as administrator , while avoiding common issues. 1. Ensure Superuser Access sudo -i -u postgres psql --dbname=financethat 2. Create a Role for PostGIS Management CREATE ROLE administrator WITH LOGIN PASSWORD 'your_secure_password'; GRANT ALL PRIVILEGES ON DATABASE financethat TO administrator; 3. Install PostGIS To install PostGIS on Ubuntu, first ensure you have the required PostgreSQL version installed. Then, use the following commands: sudo apt update sudo apt install postgis postgresql-14-postgis-3 Replace 14 with your PostgreSQL version if different. After installation, enable PostGIS in...
Read more

Implementing Throttling in Django REST Framework.

Implementing Throttling in Django REST Framework to Manage High Traffic and Prevent Abuse Introduction In high-traffic applications, it’s essential to protect server resources and ensure fair usage among users. Throttling is a method used in Django REST Framework (DRF) to limit the rate of requests, helping prevent abuse and manage load. In this article, we’ll explore how to implement throttling in DRF, including ways to apply it to specific views and dynamically whitelist IPs. What is Throttling? Throttling controls the rate of requests an API endpoint can receive from a single client. It’s a valuable tool for: Preventing abuse by limiting request rates for each user or IP address. Managing server load by avoiding high request volumes that can overwhelm the application. In Django REST Framework, throttling is easy to configure with built-in classes like UserRateThrottl...
Read more