Free to read · Three levels

Django: reliable web application boundaries

A complete theory course in request handling, templates, forms, data models, access control, testing, transactions, and deployment evidence.

18 lessonsEnglish + ArabicContent reviewed
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In this course

Learn Django through explicit responsibilities and testable contracts. Eighteen lessons connect project structure and HTTP to forms, ORM behavior, authorization, query costs, concurrent writes, secure configuration, and operational readiness. Each lesson provides explained examples, diagnostic mistakes, and complete worked exercises.

The tested baseline is Django 5.2.18 on Python 3.12.3. Complete programs configure synthetic settings and run locally, using only in-memory SQLite or their own temporary files. Application and deployment fragments remain non-runnable and identify the surrounding project requirements. No example uses a configured application database or real service.

What you will learn

  • Trace project settings, routing, middleware, views, and response contracts.
  • Validate approved input and enforce authenticated resource scope.
  • Design models and reviewed migrations without confusing validation and constraints.
  • Measure ORM work and protect concurrent transitions.
  • Test boundaries honestly and plan secure deployment and recovery evidence.

Your learning path

Three levels

Request and data foundations

Projects, URLs, HTTP views, templates, forms, models, and migration concepts.

  1. Projects, settings, and the request cycle
  2. URLs, converters, and route names
  3. Views, methods, and truthful HTTP responses
  4. Templates, context, and escaping
  5. Forms, validation, and CSRF
  6. Models, schema, and migration history
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Reliable application workflows

ORM relations, validated writes, sessions, permissions, pagination, and tests.

  1. ORM queries and relationship loading
  2. ModelForms and domain validation
  3. Authentication and session lifecycle
  4. Permissions and object scope
  5. Generic views and bounded pagination
  6. Testing requests and application boundaries
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Correctness and production evidence

Transactions, query cost, security, assets, async/cache boundaries, and observability.

  1. Transactions and concurrent writes
  2. Query performance and measurement
  3. Security settings and trust boundaries
  4. Static assets, media, and deployment
  5. Async views, caching, and work ownership
  6. Observability and operational readiness
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Who this is for

  • Python developers learning structured server-side web development.
  • Web developers strengthening Django validation, access, data, and deployment boundaries.

Before you start

  • Python functions, classes, exceptions, modules, and virtual environments.
  • Basic HTML forms, HTTP concepts, and relational-data familiarity.
  • A reviewed Django 5.2 environment for complete examples; no production project is required.

Related technical solutions

Diagnose CSRF 403 responses without disabling protectionSeparate missing tokens, cookie delivery, origin checks, and trusted proxy assumptions before changing the request contract.Separate missing templates from static-file delivery failuresLocate the failing lookup stage before changing template loaders, static settings, or deployment routes.Diagnose missing tables and schema-state mismatchesIdentify the selected settings, database identity, model mapping, and migration history before proposing any schema change.