Django REST Framework: How to implement custom authentication with JWT tokens?
I'm working on a Django project and encountering an issue with Django REST API. Here's my current implementation:
# models.py
# views.py
from django.shortcuts import render
from .models import Article
def article_list(request):
articles = Article.objects.all()
for article in articles:
print(article.author.username) # N+1 problem here
return render(request, 'articles.html', {'articles': articles})
The specific error I'm getting is: "django.template.exceptions.TemplateDoesNotExist: articles/detail.html"
I've already tried the following approaches:
- Checked Django documentation and Stack Overflow
- Verified my database schema and migrations
- Added debugging prints to trace the issue
- Tested with different data inputs
Environment details:
- Django version: 5.0.1
- Python version: 3.11.0
- Database: PostgreSQL 15
- Operating system: macOS Ventura
Has anyone encountered this before? Any guidance would be greatly appreciated!
Comments
michael_code: Could you elaborate on the select_related vs prefetch_related usage? When should I use each? 1 week, 4 days ago
1 Answer
Python decorators with arguments require a three-level nested function. Here's the proper implementation:
import functools
# Decorator with arguments
def retry(max_attempts=3, delay=1):
def decorator(func):
@functools.wraps(func) # Preserves function metadata
def wrapper(*args, **kwargs):
for attempt in range(max_attempts):
try:
return func(*args, **kwargs)
except Exception as e:
if attempt == max_attempts - 1:
raise e
time.sleep(delay)
return wrapper
return decorator
# Usage
@retry(max_attempts=5, delay=2)
def unreliable_function():
# Function that might fail
pass
Class-based decorator (alternative approach):
class Retry:
def __init__(self, max_attempts=3, delay=1):
self.max_attempts = max_attempts
self.delay = delay
def __call__(self, func):
@functools.wraps(func)
def wrapper(*args, **kwargs):
for attempt in range(self.max_attempts):
try:
return func(*args, **kwargs)
except Exception as e:
if attempt == self.max_attempts - 1:
raise e
time.sleep(self.delay)
return wrapper
# Usage
@Retry(max_attempts=5, delay=2)
def another_function():
pass
Comments
admin: Great Python profiling example! The cProfile output helped me identify the bottleneck in my data processing pipeline. 1 week, 4 days ago
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