book

Django 4 By Example - Fourth Edition

Name: Django 4 By Example - Fourth Edition
Author: Antonio Melé
ISBN: 9781801813051

by Antonio Melé

August 2022

Intermediate to advanced

766 pages

17h 21m

English

Packt Publishing

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Preface
Who this book is forWhat this book coversTo get the most out of this bookGet in touch
Building a Blog Application
Installing PythonCreating a Python virtual environmentInstalling DjangoInstalling Django with pipNew features in Django 4Django overviewMain framework componentsThe Django architectureCreating 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 relationshipCreating and applying migrationsCreating an administration site for modelsCreating a superuserThe Django administration siteAdding models to the administration siteCustomizing how models are displayedWorking with QuerySets and managersCreating objectsUpdating objectsRetrieving objectsUsing the filter() methodUsing exclude()Using order_by()Deleting objectsWhen QuerySets are evaluatedCreating model managersBuilding list and detail viewsCreating list and detail viewsUsing 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 cycleAdditional resourcesSummaryJoin us on Discord.
Enhancing Your Blog with Advanced Features
Using 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 DjangoSending 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 templateAdditional resourcesSummary
Extending Your Blog Application
Adding the tagging functionalityRetrieving 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 PostgreSQLCreating a PostgreSQL databaseDumping 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 similarityAdditional resourcesSummary
Building a Social Website
Creating a social website projectStarting the social website projectUsing the Django authentication frameworkCreating a login viewUsing Django 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 modelUsing the messages frameworkBuilding a custom authentication backendPreventing users from using an existing emailAdditional resourcesSummaryJoin us on Discord.
Implementing Social Authentication
Adding social authentication to your siteRunning the development server through HTTPSAuthentication using FacebookAuthentication using TwitterAuthentication using GoogleCreating a profile for users that register with social authenticationAdditional resourcesSummary
Sharing Content on Your Website
Creating 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 a 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 listAdditional resourcesSummary
Tracking User Actions
Building a follow systemCreating many-to-many relationships with an intermediary modelCreating list and detail views for user profilesAdding user follow/unfollow actions with JavaScriptBuilding a generic 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 Redis Installing DockerInstalling RedisUsing Redis with PythonStoring image views in RedisStoring a ranking in RedisNext steps with RedisAdditional resourcesSummary
Building an Online Shop
Creating 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 into the request contextRegistering customer ordersCreating order modelsIncluding order models in the administration siteCreating customer ordersAsynchronous tasksWorking with asynchronous tasksWorkers, message queues, and message brokersUsing Django with Celery and RabbitMQMonitoring Celery with FlowerAdditional resourcesSummaryJoin us on Discord.
Managing Payments and Orders
Integrating 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 emailAdditional resourcesSummary

Extending Your Shop
Creating 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 purchasesAdditional resourcesSummary
Adding Internationalization to Your Shop
Internationalization 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 {% trans %} template tagThe {% blocktrans %} 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 with the ORMAdapting views for translationsFormat localizationUsing django-localflavor to validate form fieldsAdditional resourcesSummary
Building an E-Learning Platform
Setting 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 templatesAdditional resourcesSummaryJoin us on Discord.
Creating a Content Management System
Creating 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-bracesAdditional resourcesSummary
Rendering and Caching Content
Displaying coursesAdding student registrationCreating a student registration viewEnrolling on coursesAccessing the 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 ToolbarCaching based on dynamic dataCaching template fragmentsCaching viewsUsing the per-site cacheUsing the Redis cache backendMonitoring Redis with Django RedisboardAdditional resourcesSummary
Building an API
Building a RESTful APIInstalling Django REST frameworkDefining serializersUnderstanding parsers and renderersBuilding list and detail viewsConsuming the APICreating nested serializersBuilding custom API viewsHandling authenticationAdding permissions to viewsCreating ViewSets and routersAdding additional actions to ViewSetsCreating custom permissionsSerializing course contentsConsuming the RESTful API Additional resourcesSummary
Building a Chat Server
Creating a chat applicationImplementing the chat room viewReal-time Django with ChannelsAsynchronous applications using ASGIThe request/response cycle using ChannelsInstalling ChannelsWriting 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 asynchronousIntegrating the chat application with existing viewsAdditional resourcesSummary
Going Live
Creating a production environmentManaging settings for multiple environmentsLocal environment settingsRunning the local environmentProduction environment settingsUsing Docker ComposeInstalling Docker ComposeCreating a Dockerfile Adding 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 HTTPSUsing Daphne for Django ChannelsUsing secure connections for WebSocketsIncluding Daphne in the NGINX configurationCreating a custom middlewareCreating a subdomain middlewareServing multiple subdomains with NGINXImplementing custom management commandsAdditional resourcesSummary
Other Books You May Enjoy
Index

Content preview from Django 4 By Example - Fourth Edition

16 Building a Chat Server

In the previous chapter, you created a RESTful API for your project. In this chapter, you will build a chat server for students using Django Channels. Students will be able to access a different chat room for each course they are enrolled on. To create the chat server, you will learn how to serve your Django project through Asynchronous Server Gateway Interface (ASGI), and you will implement asynchronous communication.

In this chapter, you will:

Add Channels to your project
Build a WebSocket consumer and appropriate routing
Implement a WebSocket client
Enable a channel layer with Redis
Make your consumer fully asynchronous

The source code for this chapter can be found at https://github.com/PacktPublishing/Django-4-by-example/tree/main/Chapter16 ...

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ISBN: 9781801813051

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Django 4 By Example - Fourth Edition

by Antonio Melé

16

Building a Chat Server

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.