Django Fundamentals

Django is a Python web framework that provides an ORM, URL routing, templating, authentication, and an admin interface out of the box. It follows a batteries-included philosophy, letting developers build database-backed web applications quickly with conventions that handle common patterns.

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Django Fundamentals

Django is a Python framework for building database-backed web applications. It brings URL routing, request handling, database access, HTML templates, forms, authentication, an administrative site, testing, and security controls into one system.

That breadth is Django's main proposition. You follow its project structure and conventions. In return, you avoid assembling a separate library for every common server-side task.

Django fits applications whose server owns business rules and persistent data. Examples include content systems, internal tools, marketplaces, and account-based services. A static site may need less machinery. A browser application that only consumes an existing API may need a client framework instead.

Follow one request

Start with the request-response cycle:

browser request
    -> middleware
    -> URL configuration
    -> view
    -> model and other services
    -> template or another response format
    -> HTTP response

A URL configuration, often shortened to URLconf, maps a path pattern to a view. A view is Python code that accepts a request and returns a response. The view can query models, validate input, call application services, and render a template.

Middleware wraps this cycle. It can inspect or change requests before the view runs. It can also inspect or change responses on the way out. Django uses middleware for cross-cutting behavior such as sessions, authentication, security headers, and Cross-Site Request Forgery protection.

This map helps you place code. URL selection belongs in the URLconf. Request-specific orchestration belongs in a view. Data rules belong near models or application services. Presentation belongs in templates.

Django Fundamentals

Django Fundamentals

Follow one request

Separate the project from its apps

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