Introduction

Django is productive because it combines a mature ORM, a strong request lifecycle, and batteries-included tooling in one framework. The best "tips" are usually not tricks, but habits that let you write less code while keeping performance and maintainability under control.

Use the ORM Deliberately

Django's ORM is easy to start with, but performance depends on how you traverse relationships. A common mistake is writing code that looks clean yet triggers one query per row. The fix is to fetch related data intentionally.

Use select_related() for foreign keys and one-to-one relationships. Use prefetch_related() for many-to-many or reverse relations.

1from blog.models import Post
2
3posts = (
4    Post.objects
5    .select_related("author")
6    .prefetch_related("tags")
7    .order_by("-published_at")[:20]
8)
9
10for post in posts:
11    print(post.title, post.author.username, [tag.name for tag in post.tags.all()])

This turns many small queries into a predictable set of larger ones. It is one of the highest-leverage Django habits because it improves latency without changing business logic.

Another useful ORM feature is values() or values_list() when you do not need full model instances.

1emails = (
2    Post.objects
3    .filter(is_published=True)
4    .values_list("author__email", flat=True)
5    .distinct()
6)
7
8for email in emails:
9    print(email)

That avoids model construction overhead and makes intent clear.

Lean on Generic Views and Forms

Django's class-based generic views are valuable when the task matches standard CRUD behavior. They reduce repeated request parsing, form handling, and redirect logic. The point is not to use class-based views everywhere, but to stop rewriting solved patterns.

1from django.urls import reverse_lazy
2from django.views.generic import CreateView
3from blog.models import Comment
4
5
6class CommentCreateView(CreateView):
7    model = Comment
8    fields = ["post", "body"]
9    success_url = reverse_lazy("comment-list")
10
11    def form_valid(self, form):
12        form.instance.created_by = self.request.user
13        return super().form_valid(form)

Forms are another area where Django gives strong defaults. Validation belongs in form or model code rather than scattered across views.

1from django import forms
2
3
4class SignupForm(forms.Form):
5    username = forms.CharField(max_length=30)
6    email = forms.EmailField()
7
8    def clean_username(self):
9        value = self.cleaned_data["username"].strip()
10        if " " in value:
11            raise forms.ValidationError("Username cannot contain spaces.")
12        return value

This keeps rules close to data entry and makes tests simpler.

Make the Admin Work for You

Django admin is often treated as a temporary tool, but it becomes genuinely powerful with a few targeted customizations. Search fields, filters, and list_select_related can turn admin from a toy into a reliable internal operations UI.

1from django.contrib import admin
2from blog.models import Post
3
4
5@admin.register(Post)
6class PostAdmin(admin.ModelAdmin):
7    list_display = ["title", "author", "is_published", "published_at"]
8    list_filter = ["is_published", "published_at"]
9    search_fields = ["title", "author__username"]
10    list_select_related = ["author"]

The admin should not replace your public application, but it is excellent for staff workflows, support cases, and data cleanup.

Prefer Settings and Middleware Features Over Reinventing Them

Django already solves many cross-cutting problems. Static files, CSRF protection, sessions, caching, and authentication are mature parts of the framework. Before adding a new package or writing custom middleware, check whether Django already provides the behavior.

For example, caching a view is often just a decorator:

1from django.views.decorators.cache import cache_page
2from django.http import JsonResponse
3
4
5@cache_page(60)
6def stats_view(request):
7    return JsonResponse({"active_users": 42})

That is simpler and safer than writing ad hoc in-memory caching in application code.

Another strong feature is the management command system. It gives you a clean home for maintenance jobs and operational tasks.

1from django.core.management.base import BaseCommand
2from blog.models import Post
3
4
5class Command(BaseCommand):
6    help = "Print unpublished post count"
7
8    def handle(self, *args, **options):
9        count = Post.objects.filter(is_published=False).count()
10        self.stdout.write(f"Unpublished posts: {count}")

Operational code written as a command is easier to run, test, and schedule than one-off scripts.

Common Pitfalls

• Using the ORM naively and causing N plus 1 queries.
• Rewriting form validation inside views instead of in forms or models.
• Treating Django admin as all-or-nothing instead of customizing the parts that matter.
• Adding packages before checking whether Django already supports the feature.
• Using generic views where custom control flow would be clearer.

Summary

• 'select_related() and prefetch_related() are among the most valuable performance features in Django.'
• Generic views and forms reduce repeated CRUD and validation code.
• Django admin becomes genuinely useful once search, filters, and related loading are configured.
• Built-in features such as caching, CSRF protection, and management commands are worth using directly.
• The best Django tips are usually disciplined use of existing framework primitives, not framework workarounds.