Django code explainers

python

from django.db import models
from django.db.models import Q
from django.conf import settings

Enforcing one default address per user in Django

data modeling database constraints partial index

Intermediate 7 steps

python

from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin
from django.shortcuts import get_object_or_404
from django.views.generic import DetailView

Team membership access control in Django

access-control mixins class-based-views

Intermediate 7 steps

python

import django_filters
from django import forms
from django.utils import timezone

Building a date-range FilterSet in Django

filtering querysets form-widgets

Intermediate 6 steps

python

from django.contrib.postgres.search import SearchQuery, SearchRank, SearchVector
from django.core.cache import cache
from django.db.models import F
from django.http import JsonResponse

Ranked full-text search in Django

full-text-search debouncing caching

Advanced 9 steps

python

from django.contrib import admin
from django.utils import timezone
from django.utils.html import format_html

Custom columns in the Django admin

admin-customization computed-columns html-rendering

Intermediate 7 steps

python

from django.contrib.auth.mixins import LoginRequiredMixin
from django.views.generic import ListView
 
from .models import Invoice

Building a scoped, filtered ListView in Django

class-based views queryset filtering authentication

Intermediate 7 steps

python

import csv
 
from django.http import StreamingHttpResponse
from django.utils.timezone import now

Streaming a CSV export in Django

streaming csv-export generators

Intermediate 7 steps

python

from functools import wraps
 
from django.core.cache import cache
from django.http import JsonResponse

Building a rate-limit decorator in Django

decorators rate limiting caching

Intermediate 7 steps

python

from decimal import Decimal
 
from django.db import transaction
from django.core.exceptions import ValidationError

Placing an order atomically in Django

transactions row-locking concurrency

Advanced 9 steps

python

from django.core.cache import cache
from django.db.models import Count, Sum, Q
from django.utils import timezone

Caching a Django dashboard aggregate query

caching aggregation conditional-queries

Intermediate 7 steps

python

import re
 
from django.core.exceptions import ValidationError
from django.core.validators import RegexValidator

Building a deconstructible validator in Django

validation regex deconstructible

Intermediate 7 steps

python

from datetime import timedelta
 
from django.contrib.sessions.models import Session
from django.core.management.base import BaseCommand

A batched session-cleanup command in Django

management-command batch-processing database-cleanup

Intermediate 7 steps

python

from django.db.models import Prefetch, Count
from django.views.generic import ListView
 
from .models import Article, Comment

Building an efficient article list in Django

orm query-optimization prefetching

Intermediate 6 steps

python

from django.db import models
from django.utils.text import slugify

Auto-generating unique slugs in Django

slugs orm model-methods

Intermediate 7 steps

python

from django.core.cache import cache
from rest_framework.throttling import SimpleRateThrottle

A login rate throttle in Django REST Framework

rate-limiting caching throttling

Intermediate 8 steps

python

from django.conf import settings
from django.contrib.auth import get_user_model
from django.core.mail import EmailMultiAlternatives
from django.db.models.signals import post_save

Sending a welcome email with Django signals

signals email user-activation

Intermediate 8 steps

python

import json
import logging
 
import stripe

Handling Stripe webhooks in Django

webhooks signature-verification idempotency

Intermediate 7 steps

python

from django.db.models import Sum, Count, F, DecimalField
from django.db.models.functions import TruncMonth, Coalesce
 
from .models import Order

Build a monthly revenue report in Django

aggregation orm group-by

Advanced 7 steps