diff --git a/docs/50-technologies/django/async-support.mdx b/docs/50-technologies/django/async-support.mdx new file mode 100644 index 0000000..82ba14f --- /dev/null +++ b/docs/50-technologies/django/async-support.mdx @@ -0,0 +1,105 @@ +--- +sidebar_position : 2 +title : Django Asynchronous Support +sidebar_label : Async Support +--- + +# Django Asynchronous Support + +Django introduced asynchronous (async) support starting from Django 3.0. +This feature allows developers to write asynchronous code within Django applications, taking advantage of Python's async and await syntax. + +Async support in Django can be beneficial for improving the scalability and responsiveness of web applications, particularly in situations where there are I/O-bound operations, +such as database queries or external API calls. + +Here's a theoretical overview of how async support works in Django and a few code examples to illustrate its usage. + +## ✅ **Theoretical Overview** + +### **Async View Functions** + +With async support, you can define view functions as asynchronous by using the `async def` syntax. +This allows these functions to perform non-blocking I/O operations and handle multiple requests concurrently. + +### **Database Queries** + +You can use Django's ORM (Object-Relational Mapping) to perform asynchronous database queries. +Async database queries help avoid blocking the event loop and allow other tasks to run while waiting for the database response. + +### **Middleware** + +Django provides async middleware support. Middleware components can also be asynchronous, making it possible to perform async operations during request and response processing. + +### **Third-party Libraries** + +You can use third-party libraries that support async operations, such as HTTP clients for making async requests to external APIs or services. + +## ✅ **Code Examples** + +Here are a few code examples to demonstrate how async support works in Django: + +### **Async View Function** + +```python +# views.py +from django.http import JsonResponse + +async def async_example(request): + # Simulate an asynchronous task (e.g., fetching data from an API) + result = await some_async_function() + return JsonResponse({'result': result}) +``` + +In this example, the `async_example` view function is defined as asynchronous using `async def`. It awaits the result of an asynchronous task, such as fetching data from an external API. + +### **Async Database Query** + +```python +# views.py +from django.http import JsonResponse +from .models import MyModel + +async def async_db_query(request): + # Perform an asynchronous database query + queryset = MyModel.objects.filter(some_field=some_value) + results = await queryset.values() + return JsonResponse({'results': results}) +``` + +In this example, an asynchronous database query is performed using Django's ORM. The `await` keyword is used to wait for the database query to complete without blocking the event loop. + +### **Async Middleware** + +```python +# middleware.py +class AsyncMiddleware: + def __init__(self, get_response): + self.get_response = get_response + + async def __call__(self, request): + # Perform an async operation before handling the request + await some_async_task() + + response = await self.get_response(request) + + # Perform an async operation after handling the request + await some_other_async_task() + + return response +``` + +In this example, the middleware `AsyncMiddleware` contains asynchronous code that runs before and after the request is handled. +This allows you to perform async tasks at different stages of request processing. + +## ✅ In Summary + +Please note that when using async features in Django, the web server needs to support asynchronous code. +For this use-case, some popular choices are ASGI (Asynchronous Server Gateway Interface) servers like Daphne or Uvicorn. + +
+ +## ✅ Resources + +- 👉 [Generate Django Apps](https://app-generator.dev/django/) using `Rocket Generator` +- 👉 Join the [Community](https://discord.gg/fZC6hup) and chat with the `support` team +- 👉 [Deploy Django on AWS, DO, and Azure](https://www.docs.deploypro.dev/) using `DeployPRO`