book

Django 5 By Example - Fifth Edition

Name: Django 5 By Example - Fifth Edition
Author: Antonio Melé
ISBN: 9781805125457

by Antonio Melé

April 2024

Beginner to intermediate

822 pages

18h 42m

English

Packt Publishing

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Preface
Building a Blog Application
Installing PythonCreating a Python virtual environmentInstalling DjangoInstalling Django with pipDjango overviewMain framework componentsThe Django architectureNew features in Django 5Creating your first projectApplying initial database migrationsRunning the development serverProject settingsProjects and applicationsCreating an applicationCreating the blog data modelsCreating the Post modelAdding datetime fieldsDefining a default sort orderAdding a database indexActivating the applicationAdding a status fieldAdding a many-to-one relationshipUsing the CompositePrimaryKey fieldCreating and applying migrationsCreating an administration site for modelsCreating a superuserThe Django administration siteAdding models to the administration siteCustomizing how models are displayedAdding facet counts to filtersWorking with QuerySets and managersCreating objectsUpdating objectsRetrieving objectsFiltering objectsUsing field lookupsChaining filtersExcluding objectsOrdering objectsLimiting QuerySetsCounting objectsChecking if an object existsDeleting objectsComplex lookups with Q objectsWhen QuerySets are evaluatedMore on QuerySetsCreating model managersBuilding list and detail viewsCreating list and detail views Using the get_object_or_404 shortcutAdding URL patterns for your viewsCreating templates for your viewsCreating a base templateCreating the post list templateAccessing our applicationCreating the post detail templateThe request/response cycleManagement commands used in this chapterSummaryAdditional resourcesJoin us on Discord!
Enhancing Your Blog and Adding Social Features
Functional overviewUsing canonical URLs for modelsCreating SEO-friendly URLs for postsModifying the URL patternsModifying the viewsModifying the canonical URL for postsAdding paginationAdding pagination to the post list viewCreating a pagination templateHandling pagination errorsBuilding class-based viewsWhy use class-based viewsUsing a class-based view to list postsRecommending posts by emailCreating forms with DjangoHandling forms in viewsSending emails with DjangoWorking with environment variablesSending emails in viewsRendering forms in templatesCreating a comment systemCreating a model for commentsAdding comments to the administration siteCreating forms from modelsHandling ModelForms in viewsCreating templates for the comment formAdding comments to the post detail viewAdding comments to the post detail templateUsing simplified templates for form renderingSummaryAdditional resourcesGet this book’s PDF version and more
Extending Your Blog Application
Functional overviewImplementing tagging with django-taggitRetrieving posts by similarityCreating custom template tags and filtersImplementing custom template tagsCreating a simple template tagCreating an inclusion template tagCreating a template tag that returns a QuerySetImplementing custom template filtersCreating a template filter to support Markdown syntaxAdding a sitemap to the siteCreating feeds for blog postsAdding full-text search to the blogInstalling DockerInstalling PostgreSQLDumping the existing dataSwitching the database in the projectLoading the data into the new databaseSimple search lookupsSearching against multiple fieldsBuilding a search viewStemming and ranking resultsStemming and removing stop words in different languagesWeighting queriesSearching with trigram similaritySummaryExpanding your project using AIAdditional resourcesGet this book’s PDF version and more
Building a Social Website
Functional overviewCreating a social website projectStarting the social website projectUsing the Django authentication frameworkCreating a login viewUsing Django’s built-in authentication viewsLogin and logout viewsChange password viewsReset password viewsUser registration and user profilesUser registrationExtending the user modelInstalling Pillow and serving media filesCreating migrations for the profile modelUsing a custom user modelSummaryAdditional resourcesJoin us on Discord!
Implementing Social Authentication
Functional overviewTechnical requirementsUsing the messages frameworkBuilding a custom authentication backendPreventing users from using an existing email addressAdding social authentication to your siteRunning the development server through HTTPSAuthentication using GoogleCreating a profile for users that register with social authenticationSummaryAdditional resourcesGet this book’s PDF version and more
Sharing Content on Your Website
Functional overviewCreating an image bookmarking websiteBuilding the image modelCreating many-to-many relationshipsRegistering the image model in the administration sitePosting content from other websitesCleaning form fieldsInstalling the Requests libraryOverriding the save() method of a ModelFormBuilding a bookmarklet with JavaScriptCreating the detail view for imagesCreating image thumbnails using easy-thumbnailsAdding asynchronous actions with JavaScriptLoading JavaScript on the DOMCross-site request forgery for HTTP requests in JavaScriptPerforming HTTP requests with JavaScriptAdding infinite scroll pagination to the image listSummaryAdditional resourcesGet this book’s PDF version and more
Tracking User Actions
Functional overviewBuilding a follow systemCreating many-to-many relationships with an intermediate modelCreating list and detail views for user profilesAdding user follow/unfollow actions with JavaScriptCreating an activity stream applicationUsing the contenttypes frameworkAdding generic relations to your modelsAvoiding duplicate actions in the activity streamAdding user actions to the activity streamDisplaying the activity streamOptimizing QuerySets that involve related objectsUsing select_related()Using prefetch_related()Creating templates for actionsUsing signals for denormalizing countsWorking with signalsApplication configuration classesUsing Django Debug ToolbarInstalling Django Debug ToolbarDjango Debug Toolbar panelsDjango Debug Toolbar commandsCounting image views with RedisInstalling RedisUsing Redis with PythonStoring image views in RedisStoring a ranking in RedisNext steps with RedisSummaryExpanding your project using AIAdditional resourcesGet this book’s PDF version and more
Building an Online Shop
Functional overviewCreating an online shop projectCreating product catalog modelsRegistering catalog models on the administration siteBuilding catalog viewsCreating catalog templatesBuilding a shopping cartUsing Django sessionsSession settingsSession expirationStoring shopping carts in sessionsCreating shopping cart viewsAdding items to the cartBuilding a template to display the cartAdding products to the cartUpdating product quantities in the cartCreating a context processor for the current cartContext processorsSetting the cart in the request contextRegistering customer ordersCreating order modelsIncluding order models in the administration siteCreating customer ordersCreating asynchronous tasksWorking with asynchronous tasksWorkers, message queues, and message brokersUsing Django with Celery and RabbitMQMonitoring Celery with FlowerSummaryAdditional resourcesJoin us on Discord!
Managing Payments and Orders
Functional overviewIntegrating a payment gatewayCreating a Stripe accountInstalling the Stripe Python libraryAdding Stripe to your projectBuilding the payment processIntegrating Stripe CheckoutTesting the checkout processUsing test credit cardsChecking the payment information in the Stripe dashboardUsing webhooks to receive payment notificationsCreating a webhook endpointTesting webhook notificationsReferencing Stripe payments in ordersGoing liveExporting orders to CSV filesAdding custom actions to the administration siteExtending the administration site with custom viewsGenerating PDF invoices dynamicallyInstalling WeasyPrintCreating a PDF templateRendering PDF filesSending PDF files by emailSummaryAdditional resourcesGet this book’s PDF version and more

Extending Your Shop
Functional overviewCreating a coupon systemBuilding the coupon modelApplying a coupon to the shopping cartApplying coupons to ordersCreating coupons for Stripe CheckoutAdding coupons to orders on the administration site and to PDF invoicesBuilding a recommendation engineRecommending products based on previous purchasesSummaryAdditional resourcesGet this book’s PDF version and more
Adding Internationalization to Your Shop
Functional overviewInternationalization with DjangoInternationalization and localization settingsInternationalization management commandsInstalling the gettext toolkitHow to add translations to a Django projectHow Django determines the current languagePreparing your project for internationalizationTranslating Python codeStandard translationsLazy translationsTranslations including variablesPlural forms in translationsTranslating your own codeTranslating templatesThe {% translate %} template tagThe {% blocktranslate %} template tagTranslating the shop templatesUsing the Rosetta translation interfaceFuzzy translationsURL patterns for internationalizationAdding a language prefix to URL patternsTranslating URL patternsAllowing users to switch languageTranslating models with django-parlerInstalling django-parlerTranslating model fieldsIntegrating translations into the administration siteCreating migrations for model translationsUsing translations in QuerySetsAdapting views for translationsFormat localizationUsing django-localflavor to validate form fieldsExpanding your project using AISummaryAdditional resourcesGet this book’s PDF version and more
Building an E-Learning Platform
Functional overviewSetting up the e-learning projectServing media filesBuilding the course modelsRegistering the models in the administration siteUsing fixtures to provide initial data for modelsCreating models for polymorphic contentUsing model inheritanceAbstract modelsMulti-table model inheritanceProxy modelsCreating the Content modelsCreating custom model fieldsAdding ordering to Module and Content objectsAdding authentication viewsAdding an authentication systemCreating the authentication templatesSummaryAdditional resourcesJoin us on Discord!
Creating a Content Management System
Functional overviewCreating a CMSCreating class-based viewsUsing mixins for class-based viewsWorking with groups and permissionsRestricting access to class-based viewsManaging course modules and their contentsUsing formsets for course modulesAdding content to course modulesManaging modules and their contentsReordering modules and their contentsUsing mixins from django-bracesSummaryAdditional resourcesGet this book’s PDF version and more
Rendering and Caching Content
Functional overviewDisplaying the catalog of coursesAdding student registrationCreating a student registration viewEnrolling in coursesRendering course contentsAccessing course contentsRendering different types of contentUsing the cache frameworkAvailable cache backendsInstalling MemcachedInstalling the Memcached Docker imageInstalling the Memcached Python bindingDjango cache settingsAdding Memcached to your projectCache levelsUsing the low-level cache APIChecking cache requests with Django Debug ToolbarLow-level caching based on dynamic dataCaching template fragmentsCaching viewsUsing the per-site cacheUsing the Redis cache backendMonitoring Redis with Django RedisboardSummaryAdditional resourcesGet this book’s PDF version and more
Building an API
Functional overviewBuilding a RESTful APIInstalling Django REST frameworkDefining serializersUnderstanding parsers and renderersBuilding list and detail viewsConsuming the APIExtending serializersAdding additional fields to serializersImplementing serializer method fieldsAdding pagination to viewsBuilding the course serializerSerializing relationsCreating nested serializersCreating ViewSets and routersBuilding custom API viewsHandling authenticationImplementing basic authenticationAdding permissions to viewsAdding additional actions to ViewSetsCreating custom permissionsSerializing course contentsConsuming the RESTful APISummaryAdditional resourcesGet this book’s PDF version and more
Building a Chat Server
Functional overviewCreating a chat applicationImplementing the chat room viewReal-time Django with ChannelsAsynchronous applications using ASGIThe request/response cycle using ChannelsInstalling Channels and DaphneWriting a consumerRoutingImplementing the WebSocket clientEnabling a channel layerChannels and groupsSetting up a channel layer with RedisUpdating the consumer to broadcast messagesAdding context to the messagesModifying the consumer to be fully asynchronousPersisting messages into the databaseCreating a model for chat messagesAdding the message model to the administration siteStoring messages in the databaseDisplaying the chat historyIntegrating the chat application with existing viewsSummaryAdditional resourcesGet this book’s PDF version and more
Going Live
Creating a production environmentManaging settings for multiple environmentsLocal environment settingsRunning the local environmentProduction environment settingsUsing Docker ComposeInstalling Docker Compose via Docker DesktopCreating a DockerfileAdding the Python requirementsCreating a Docker Compose fileConfiguring the PostgreSQL serviceApplying database migrations and creating a superuserConfiguring the Redis serviceServing Django through WSGI and NGINXUsing uWSGIConfiguring uWSGIUsing NGINXConfiguring NGINXUsing a hostnameServing static and media assetsCollecting static filesServing static files with NGINXSecuring your site with SSL/TLSChecking your project for productionConfiguring your Django project for SSL/TLSCreating an SSL/TLS certificateConfiguring NGINX to use SSL/TLSRedirecting HTTP traffic over to HTTPSConfiguring Daphne for Django ChannelsUsing secure connections for WebSocketsIncluding Daphne in the NGINX configurationCreating a custom middlewareCreating subdomain middlewareServing multiple subdomains with NGINXImplementing custom management commandsSummaryExpanding your project using AIAdditional resourcesJoin us on Discord!
Other Books You May Enjoy
Index

Content preview from Django 5 By Example - Fifth Edition

7 Tracking User Actions

In the previous chapter, you built a JavaScript bookmarklet to share content from other websites on your platform. You also implemented asynchronous actions with JavaScript in your project and created an infinite scroll.

In this chapter, you will learn how to build a follow system and create a user activity stream. You will also discover how Django signals work and you will integrate Redis’s fast I/O storage into your project to store item views.

This chapter will cover the following points:

Building a follow system
Creating many-to-many relationships with an intermediate model
Creating an activity stream application
Adding generic relations to models
Optimizing QuerySets for related objects
Using signals for denormalizing ...

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Django 5 By Example - Fifth Edition

by Antonio Melé

7

Tracking User Actions

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.