Categories

ORM, @property, and Celery Debugging: Encrypted Fields and FieldDoesNotExist Issues

Fix FieldDoesNotExist errors caused by wrapping encrypted fields with @property in Django models. Learn why this issue occurs, how it creates silent bugs in Celery retry logic, and explore solutions using custom model fields.

Understanding the Difference Between _, __, and . in Django ORM: When to Use user_id, user.id, or user__id?

A clear guide to the often‑confusing `_`, `__`, and `.` symbols in Django ORM. It explains the real‑world meaning of `user_id`, `user.id`, and `user__id`, covers performance implications, and offers practical tips to avoid N+1 queries and unnecessary JOINs.

Ensuring Server‑to‑Server Integrity with HMAC Signatures in Django/DRF

Learn how to secure server‑to‑server communication in Django/DRF with HMAC signatures—covering key sharing, timestamp protection, replay attack mitigation, and practical mixin and authentication class implementations for robust, tamper‑proof requests.

Understanding `tests.py` for Django Developers

This post summarizes the role and usage of the automatically generated `tests.py` file in Django apps. Explore how to write tests, execute them, structure them into packages, and see real-world examples.

Confronting the Essence of Django - Why `HttpResponse` is the 'Fundamental'

Explore the core reasons and roles of HttpResponse in Django. This article explains how the HttpResponse object connects requests and responses and performs essential functions in web applications.

Django's HTML Guardian - Unpacking 'django.utils.html'

This post explains in detail how to implement XSS defense and safe HTML generation using Django's django.utils.html module.

Mastering Text Manipulation in Django - 'django.utils.text'

This post summarizes the core text processing utilities provided by Django's django.utils.text module. It introduces key functions and usage examples, including slugify and get_valid_filename.

The Magic of Time Management in Django - A Complete Guide to 'django.utils.timezone'

A comprehensive guide on the core module for timezone management in Django, django.utils.timezone. It covers aspects like UTC storage, local conversion, differences between Naive and Aware times, and how to use make_aware with practical examples.

Django's HTTP Utility - 'django.utils.http'

This post introduces how to implement URL encoding, safe token transmission, and redirection security using Django's `django.utils.http` module.

Understanding Django's Time Solver 'dateparse'

A post summarizing the usage and advantages of the utility module `django.utils.dateparse` for converting ISO 8601 date/time strings to Python datetime objects in Django.

Exploring django.utils.cache

Learn how to use Django's HTTP caching tool, django.utils.cache, to reduce server load and enhance user experience.

Reasons to Hide Admin Right Now

This post summarizes the reasons and methods for immediately hiding the admin interface of Django. It serves as a practical guide to enhance security and operational efficiency.

Proper Use of datetime and Timezone in Django

This guide outlines how to handle datetime and timezone safely in Django and Python, covering key concepts such as naive/aware, ISO8601, and timestamp with practical examples.

How to Use Django's get_valid_filename Function

Learn how to safely convert filenames using Django's get_valid_filename function along with practical examples.

A Comprehensive Guide to django.core.signing - Preventing Data Tampering

This guide summarizes how to prevent data tampering using Django's django.core.signing module, including various use cases.

Implementing One-Time Tokens and the Pitfalls of `max_age` in Django Signing

This post introduces the limitations of `django.core.signing` and provides examples for implementing one-time tokens using DB and Cache.

In-depth Exploration of Celery's apply_async() and Its Relationship with delay()

An in-depth analysis of the differences between delay() and apply_async() in Celery, along with advanced asynchronous task control methods utilizing various parameters.

The Magic of Celery: Unveiling the `delay()` Function

Uncover the secrets of the Celery delay() method! Discover how the delay() function enhances your asynchronous tasks smartly and explore practical applications right now.

Exploring Class-Based Views (CBV) Series ⑧ - Deep Dive into Pagination and Search Functionality – Extending ListView

This post introduces practical strategies for implementing pagination, search, and sorting functionalities by extending Django ListView, enhancing user experience through advanced CBV practices!

Exploring Class-Based Views (CBV) Series ⑦ - Utilizing Mixins and Permission Management

Learn how to modularize common functionalities using Django Mixins and automate permission management with LoginRequiredMixin and PermissionRequiredMixin.

Exploring Class-Based Views (CBV) Series ⑥ - How to Use TemplateView & RedirectView

Automate static pages and URL redirection with Django TemplateView and RedirectView. Discover practical view strategies for quick setups without code.

Exploring Class-Based Views (CBV) Series ⑤ – Implementing CRUD with CreateView, UpdateView, and DeleteView

Automate Django CRUD with CreateView, UpdateView, and DeleteView. Quickly build web apps using generic views to enhance both productivity and code quality.

Exploring Class-Based Views (CBV) Series ④ - How to Use ListView & DetailView

Automate listing and detail pages with Django ListView and DetailView. Explore practical strategies to implement pagination, sorting, and data output in just a few lines!

Exploring Class-Based Views (CBV) Series ③ - Simplifying Form Handling with FormView

True developers use FormView. Here’s a practical strategy for designing Django form handling to be the most structured and concise, from form validation to redirection!

Exploring Class-Based Views (CBV) Series ② - Understanding Django's Basic View Classes

Understand Django's View classes based on Python, and structurally comprehend the dispatch method and CBV flow to enhance your backend development skills.

Exploration Series of Class-Based Views (CBV) ① Reasons to Transition from FBV to CBV and the Developer's Mindset

Learn about effective development practices in Django through the structural differences between FBV and CBV, and explore directions for enhancing developers' skills in the age of AI.

Problems and Solutions When Using gettext_lazy with JSON Keys

This article explains the serialization issues and solutions when using gettext_lazy as a JSON key in Django. It guides you to understand the differences using keys and values and how to handle them safely.

Django on_commit + Celery, Troubleshooting in a Replica Environment

This post shares a real case of solving issues that arose when combining transaction.on_commit(), Celery asynchronous processing, and a replica environment in Django.

Analysis of on_commit + Celery + ManyToMany Delay Issues in Replica Environments

This post analyzes the delay issues that can occur in replica environments when using transaction.on_commit() and Celery in Django and suggests solutions.

The Evolution of Model Choice Definitions: An Overview of the TextChoices Class

This post compares the traditional method of defining choices in Django models with the `TextChoices` class, highlighting ways to enhance code maintainability and reusability.

Customizing the 404 Error Page in Django

A practical guide on customizing the 404 error page in Django, covering error cases, template locations, and handler404 settings.

Applying Poppins and sans-serif Fonts Reliably in Django Web Projects

Learn how to apply Google Poppins and system sans-serif fonts stably in Django with Docker, supporting CJK and local fallback strategies.

Django-Celery-Beat: Setting Up Scheduled Tasks Using Crontab and Clocked

This article explains how to set up scheduled tasks in Django-Celery-Beat using Crontab and Clocked. It covers how to schedule tasks that run at specific times and those that run only once.

Django-Celery-Beat: Practical Example of Scheduled Tasks Utilizing PeriodicTask

This post explains how to flexibly create and modify PeriodicTasks in Django-Celery-Beat using update_or_create. It discusses its relationship with IntervalSchedule and various configuration methods.

Django-Celery-Beat: How to Create Scheduled Tasks

How to create scheduled tasks using Django-Celery-Beat. This post explains how to register and manage periodic tasks using Python code.

When Does Django's request Object Get Destroyed?

When does Django's request object get destroyed? Explore how the Django request object operates, being created at the start of an HTTP request and automatically deleted once the response is completed.

Does Django's request.session.get() Trigger a DB Query?

Does Django's request.session.get() trigger a DB query? We analyze the operation of Django's SessionMiddleware and the process of loading session data through experiments.

What is 'Lazy Evaluation' in Django?

Understand the concept of Lazy Evaluation in Django and learn about performance optimization by comparing it with Eager Evaluation of QuerySet.

Comparison of Django QuerySet’s `.only()` vs `.values()` – Differences and Usage

Compare the differences and usage of Django QuerySet's .only() and .values() methods. Learn about their advantages and when to use each option for performance optimization.

What is the `.values()` Method in Django QuerySet?

The .values() method in Django provides the functionality to select specific fields in a QuerySet and is useful for performance optimization. Check out the differences and usage with .values_list().

Solving the N+1 Problem in Django ORM – A Comprehensive Guide to select_related and prefetch_related

This post explains in detail the concepts and differences of select_related and prefetch_related to solve the N+1 problem encountered in Django ORM.

What is the N+1 Problem in Django ORM? Why Does it Occur?

This article conceptually explains the N+1 problem that occurs in Django ORM and analyzes its causes through various examples.

Simplifying Dynamic Web Development with Django and HTMX (Part 7): JSON Response Method

Explore the JSON response method using Django and HTMX for dynamic web application development. Learn how to handle flexible and scalable JSON responses.

Simplifying Dynamic Web Development with Django and HTMX (Part 6): HTML Return Method

Learn how to leverage server-rendered HTML for dynamic web development with Django and HTMX. Explore template rendering and simple HTML response examples.

Simplifying Dynamic Web Development with Django and HTMX (Part 5)

This post introduces methods to extend integration with Django through HTMX's advanced features. Explore powerful features like hx-trigger, hx-params, and hx-swap.

Simplifying Dynamic Web Development with Django and HTMX (Part 4)

Learn how to handle CSRF tokens in Django and HTMX. Check out an integrated approach that considers both security and efficiency.

Simplifying Dynamic Web Development with Django and HTMX (Part 3)

Learn the preparations and configuration methods for integrating HTMX with Django. Easily implement dynamic web applications.

Simplifying Dynamic Web Development with Django and HTMX (Part 2)

Explore the relationship between HTMX and Ajax, the differences between HTMX and React, and working examples of Ajax requests with HTMX to understand practical applications in Django.

Simplifying Dynamic Web Development with Django and HTMX (Part 1)

Discover how to simplify dynamic web development using Django and HTMX. Learn about the differences from traditional templating and the powerful features of HTMX.

The Django Request Object: Its Identity and Working Principle

Analyze what the Django request object is, where it is created, and its operational principles. Deeply understand this essential object in Django development.

Django Decorators Inspired by Mathematics: The Beauty of Function Composition and Function Spaces

Explore the connection between math and Django decorators, and how function composition inspires elegant programming tools.

The Mechanics and Creation of Custom Decorators in Django

Learn how to create custom decorators in Django, including the internal workings and step-by-step instructions for adding parameters. Ideal for reusable, clean code.

Django Forms Part 6: Advanced Usage of Forms

This post covers advanced usage of Django Forms, including FormSets, dynamic fields, custom widgets, and performance optimization techniques. A must-read guide for efficient form implementation.

Django Forms Part 5: Styling with CSS

Learn how to enhance user experience using Django Forms and CSS. Discover how to implement advanced styling with Bootstrap and django-crispy-forms.

Django Forms Part 4: Validation and Customization

This post explains how to validate and customize Django Forms, providing practical examples and guides for data accuracy and security.

Django Forms Part 3: Fields and Widgets

This article provides a detailed explanation of the basic concepts and customization methods for fields and widgets in Django Forms. A guide that is easy to understand for beginners.

Differences Between Django Forms and ModelForms

This post explains the differences between Django Forms and ModelForms along with their use cases. It is easy to understand even for beginners.

What are Django Forms? Basic Concepts and Principles

This article explains the basic concepts, definitions, and usage of Django Forms in a way that beginners can easily understand.

What is Duplication in Django ORM? The Need and Usage of the distinct() Method

Learn how to use the distinct() method in Django ORM to eliminate duplicate data based on fields. This guide explains when duplication occurs, how to apply distinct() with various use cases, and best practices for using it efficiently with different databases.

Differences and Uses of get_language() and request.LANGUAGE_CODE in Django

Explore the differences and uses of get_language() and request.LANGUAGE_CODE in Django. Learn how to effectively manage multilingual support in your applications.

Using the Q Class in Django: A Simple Way to Handle Complex Conditions

Learn how to utilize Django's Q class to easily handle complex query conditions in your web applications.

Setting Up Cache in Django Development: Performance Optimization with Redis

Learn how to effectively set up caching in Django using Redis for improved performance and resource management.

In-Depth Analysis of render_to_string for Sending HTML Emails in Django

Learn how to send HTML emails in Django using the render_to_string method. This comprehensive guide covers usage, examples, and important considerations.

Django's QueryDict: An Object Like a Dictionary, But More Than Just a Dictionary

Explore Django's QueryDict, an object that allows multiple values for the same key, providing a developer-friendly API while ensuring data integrity.

Understanding the Relationship Between One-off and Enabled in Celery Beat: Correct Usage and Insights

Explore how to effectively manage tasks in Celery Beat using one-off settings. Learn about the enabled field and best practices for task scheduling.

Comparison of Django Session Deletion Methods: flush(), pop(), del

A comprehensive comparison of Django's session deletion methods: flush(), pop(), and del. Discover when to use each method for efficient session management.

Celery @shared_task Options: A Complete Guide to bind, autoretry_for, retry_backoff, max_retries

Explore the complete guide to Celery @shared_task options including bind, autoretry_for, retry_backoff, and max_retries for enhancing task reliability.

QuerySet and Data Retrieval in Django ORM

Explore QuerySet and data retrieval methods in Django ORM, covering basic usage, filtering, reverse lookups, and performance optimization.

What is the objects manager in Django ORM? - In-depth Analysis

Explore the objects manager in Django ORM, a powerful tool for simplifying database interactions, creating custom managers, and efficient data handling.

What is Django ORM? An Introduction to ORM Concepts for Beginners

Learn about Django ORM, its concepts, and how to effectively use it for managing data in your web applications.

Periodic Task Options Available in Django-celery-beat Admin

Explore various scheduling options in Django-celery-beat Admin for effective task management tailored to specific needs.

Django-celery-beat and Backend Memory Management (Part 1)

Discover how Django-celery-beat enhances backend memory management and the essential role of the celery.backend_cleanup task for optimal performance.

3 Practical Tips to Keep Your Django Server Running Without SSH Session Dropping

Discover practical tips for maintaining your Django development server's uptime amidst SSH session drops, using SSH configuration, tmux, and systemd.

Deep Dive into Django Model Structure: An Approach for Better Database Design

Discover how to enhance your database design with Django's model structure, including inheritance and custom user models for powerful ORM functionalities.

A Complete Understanding of Django Signals: Practical Use Cases of pre_save and post_save

Learn about the use of Django Signals, specifically pre_save and post_save, to enhance your application's functionality in a practical way.

Django related_name Option: Why is it Needed?

Understand the importance of related_name in Django ORM, exploring its necessity for clarity and management of model relationships effectively.

Django Model Field Options: Difference and Usage of blank=True vs null=True

Understand the differences between blank=True and null=True in Django model fields and learn how to use them effectively for flexible database structures.

Django Model Structure: models.Model, AbstractUser, CustomUser, and Manager Classes

Explore the structure of Django models including models.Model, AbstractUser, CustomUser, and the role of managers in user creation.

Using __(Double Underscore) in Django ORM: Leveraging Relational Fields and Queries

Explore the usage of double underscores in Django ORM for efficient relational field access and query building.