Django is a Python web framework that simplifies web development through reusable components and built-in features such as authentication, database connectivity, and CRUD operations, following the DRY (Don’t Repeat Yourself) principle.
It follows the MVT (Model-View-Template) design pattern:
- Model: Represents the data you want to display, typically sourced from a database.
- View: Handles incoming requests and returns the appropriate template and content based on the user's request.
- Template: A text file (usually HTML) that defines the structure of the web page and includes logic for displaying the data.
Why Use Django Framework?
- Built-in Admin: It comes with a ready-to-use admin interface to manage your website data easily.
- Security: Django has built-in protections to guard against common security threats like SQL injection, XSS, and CSRF.
- Reusability: Django follows the DRY (Don't Repeat Yourself) principle, encouraging reusable code components.
- Scalable: Django is designed to handle websites of all sizes, from small apps to large-scale projects.
- ORM (Object-Relational Mapping): Easily interact with your database without writing SQL queries.
- URL Routing: Clean and simple URL structure that maps URLs to views in your app.
- Templating Engine: Separate your HTML from Python code using Django’s templating system, making dynamic content easy to manage.
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Basics
Django organizes applications into reusable apps, each responsible for a specific feature. This section covers the fundamentals of creating and structuring a Django project.
Models
Models define your database schema using Python code. Django's ORM (Object-Relational Mapper) handles data migrations and queries.
- Models
- Basic App Model – Makemigrations and Migrate
- Model data types and fields list
- Render Model in Django Admin Interface
- ORM – Inserting, Updating & Deleting Data
- Field Validations and Built-In Fields
Query-Sets
A QuerySet is a collection of data from the database. It allows you to filter and sort records using Python methods.
- QuerySets: Introduction and Using get()
- QuerySets fiter()
- QuerySets order_by()
- Aggregation and Annotation in Django
URLs
URL patterns are used to route incoming requests to the right views in your application. This routing system allows for clean, readable URL structures.
- URLs
- URL Dispatcher & Advanced URL Techniques
- URL Validator in Django
- URL Shortener with Django
- URLResolver error
Views
Django views receive web requests and return web responses. There are two two main types of views: Function Based Views (FBVs) and Class Based Views (CBVs).
Templates
Django templates are used to generate HTML pages by combining static content with dynamic data using template tags and variables, helping separate design from application logic.
Control Flow
Django variables are used inside templates to display dynamic data passed from views. You can include variables within double curly braces like {{ variable_name }} to show values on your web pages.
Admin Interface
Django Admin Interface is a pre-built tool for managing application data. It allows users to perform CRUD operations without writing custom code.
- Superuser in Django
- Django Admin Interface
- CRUD Operation in Django Admin
- Customize Object Names with __str__ Method
- Django Admin - Redesign and Customization
Forms
Django comes with built-in Forms that simplify creating and managing HTML forms in web apps. Django Forms automate HTML form generation, data validation, and security (CSRF protection).
- Forms
- Render Django Form Fields Manually
- Handling HTML Forms in Django: GET and POST Methods
- Form Validation in Django
- ModelForm
- Formsets
- ModelFormSets
Authentication and Authorization
Authentication verifies the identity of users, while authorization determines what actions those users are allowed to perform. Django provides a built-in authentication system that includes features like user login, password management, permissions, and user groups.
- User Authentication System using Django
- Custom User Models in Django: AbstractUser and AbstractBaseUser
- User Groups with Custom Permissions in Django
Django REST Framework
Django REST Framework (DRF) is used to build Web APIs. It enables data exchange between your server and external clients like mobile apps or React/Vue frontends.
- Serializers - REST Framework
- ViewSets & Routers - REST framework
- Building a Simple API with Django REST Framework
- Authentication - REST Framework
- JWT Authentication with REST Framework
- API Permissions - REST Framework
- Object Level Permissions - REST Framework
Middlewares & Signals
Middleware processes requests and responses globally before or after they reach views. Signals enable different parts of a Django application to communicate by triggering actions when specific events occur.
Third-party integrations
Django can be integrated with various third-party services and frontend frameworks to extend application functionality. These integrations help connect Django with external systems for authentication, payments, cloud databases, and modern frontend interfaces.
- Connect Django with Reactjs
- Google Authentication and Fetching Emails using Django
- Razorpay Integration in Django
- AWS RDS Creation and Integration with Django
- Connecting a MySQL Database to a Django Project
Miscellaneous
This section covers additional Django topics and practical aspects required for real-world development, including sessions, testing, debugging, deployment, internationalization, and security best practices.
- Sessions in Django
- Add the slug field inside Django Model
- Globalizing Django Applications: Internationalization and Localization
- Individual Test Cases
- Unit Testing in Django
- Test Driven Development of Web API using DRF & Docker
- Debugging a Django Application
- Dealing with Unapplied Migration Warnings - Django
- Best Practices for Managing Django Secret Keys and Environment Variables
- Deploy Django project on PythonAnywhere
- Deploy Django application on Heroku
- When to Use Django? Comparison with other Development Stacks
Django Projects
Apply your knowledge by building these step-by-step projects:
- E-Commerce Website Using Django
- ToDo webapp using Django
- Weather app using Django
- Django News App
- College Management System Using Django
- Creating Word Counter App Using Django
- Voting System Project Using Django
- Advanced Django Projects
Django Quiz
Python Django Interview Question
Preparing for interviews is essential for securing a job. Below are some commonly asked Django interview questions to help improve preparation and increase the chances of success.
Applications of Django
Django is a versatile web framework used in a wide range of industries and projects. Here are some common applications:
- Content Management Systems (CMS): Django is ideal for building custom CMS platforms due to its modularity and flexibility.
- E-commerce Sites: Platforms like e-commerce websites benefit from Django’s scalability and robust security features.
- Social Networking Platforms: Django’s ability to handle high traffic makes it perfect for social media apps and community-based websites.
- Data-Driven Applications: With its powerful ORM and database management capabilities, Django is great for building applications that rely on large datasets.
- API Development: Django, coupled with Django REST Framework (DRF), makes it simple to develop robust and scalable APIs.
- Scientific Computing Platforms: Django is used in platforms that require complex data analysis and visualization.
- News & Publishing Platforms: Its ability to manage large volumes of content efficiently makes it a go-to for news websites and online publications.
- Educational Platforms: Many e-learning websites and educational tools are built with Django for its scalability and security.