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Flask Framework Cookbook - Third Edition

Name: Flask Framework Cookbook - Third Edition
Author: Shalabh Aggarwal
ISBN: 9781804611104

by Shalabh Aggarwal

July 2023

Intermediate to advanced

318 pages

6h 29m

English

Packt Publishing

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Flask Framework Cookbook
Third EditionContributorsAbout the authorAbout the reviewers
Preface
Who this book is forWhat this book coversTo get the most out of this bookDownload the example code filesDownload the color imagesConventions usedGet in touchShare Your ThoughtsDownload a free PDF copy of this book
Part 1: Flask Fundamentals
Chapter 1: Flask Configurations
Technical requirementsSetting up a virtual environmentHow to do it...How it works...There’s more...See alsoHandling basic configurationsGetting readyHow to do it...How it works...Configuring using class-based settingsHow to do it...How it works...Organizing static filesHow to do it...How it works...There’s more...Being deployment-specific with the instance folderHow to do it...How it works...Composition of views and modelsHow to do it...How it works...See alsoCreating a modular web app with blueprintsGetting readyHow to do it...How it works...Making a Flask app installable using setuptoolsHow to do it...How it works...See also
Chapter 2: Templating with Jinja
Technical requirementsBootstrapping the standard layoutGetting readyHow to do it...How it works...Getting readyHow to do it...How it works...Creating a custom context processorHow to do it...Creating a custom Jinja filterHow to do it...How it works...See alsoCreating a custom macro for formsGetting readyHow to do it...Advanced date and time formattingGetting readyHow to do it...How it works…There’s more…
Chapter 3: Data Modeling in Flask
Creating an SQLAlchemy DB instanceGetting readyHow to do it...There’s more…See alsoCreating a basic product modelHow to do it…How it works...Creating a relational category modelHow to do it...How it works…See alsoMigrating databases using Alembic and Flask-MigrateGetting readyHow to do it...How it works...See alsoIndexing model data with RedisGetting readyHow to do it...How it works...Opting for the NoSQL way with MongoDBGetting readyHow to do it...How it works…See also
Chapter 4: Working with Views
Writing function-based views and URL routesGetting readyHow to do it...How it works...There’s more...Writing class-based viewsGetting readyHow to do it...How it works...There’s more...See alsoImplementing URL routing and product-based paginationGetting readyHow to do it...See alsoRendering to templatesGetting readyHow to do it...How it works...See alsoDealing with XHR requestsGetting readyHow to do it...How it works...Using decorators to handle requests beautifullyGetting readyHow to do it...See alsoCreating custom 4xx and 5xx error handlersGetting readyHow to do it...How it works...There’s more...Flashing messages for better user feedbackGetting readyHow to do it...How it works...Implementing SQL-based searchingGetting readyHow to do it...How it works...
Part 2: Flask Deep Dive
Chapter 5: Web Forms with WTForms
Representing SQLAlchemy model data as a formGetting readyHow to do it...How it works...See alsoValidating fields on the server sideHow to do it...How it works...See alsoCreating a common form setHow to do it...How it works...Creating custom fields and validationsHow to do it...How it works...There’s more...Creating a custom widgetHow to do it...How it works...See alsoUploading files via formsHow to do it...How it works...Protecting applications from CSRFHow to do it...How it works...
Chapter 6: Authenticating in Flask
Creating a simple session-based authenticationGetting readyHow to do it...How it works...See alsoAuthenticating using the Flask-Login extensionGetting readyHow to do it...How it works…There’s more…See alsoUsing Facebook for authenticationGetting readyHow to do it...How it works…Using Google for authenticationGetting readyHow to do it…How it works…Using Twitter for authenticationGetting readyHow to do it...How it works…Authenticating with LDAPGetting readyHow to do it...How it works…See also

Chapter 7: RESTful API Building
Creating a class-based REST interfaceGetting readyHow to do it...How it works...Creating an extension-based REST interfaceGetting readyHow to do it…How it works…See alsoCreating a complete RESTful APIGetting readyHow to do it…How it works…
Chapter 8: Admin Interface for Flask Apps
Creating a simple CRUD interfaceGetting readyHow to do it...How it works...Using the Flask-Admin extensionGetting readyHow to do it…How it works…There’s more…Registering models with Flask-AdminGetting readyHow to do it…How it works…Creating custom forms and actionsGetting readyHow to do it…How it works…Using a WYSIWYG editor for textarea integrationGetting readyHow to do it…How it works…See alsoCreating user rolesGetting readyHow to do it…How it works…
Chapter 9: Internationalization and Localization
Adding a new languageGetting readyHow to do it...How it works...There’s more…See alsoImplementing lazy evaluation and the gettext/ngettext functionsGetting readyHow to do it…How it works…Implementing the global language-switching actionGetting readyHow to do it…How it works…There’s more…
Part 3: Advanced Flask
Chapter 10: Debugging, Error Handling, and Testing
Setting up basic file loggingGetting readyHow to do it...How it works...There’s more…See alsoSending emails on the occurrence of errorsGetting readyHow to do it…How it works…Using Sentry to monitor exceptionsGetting readyHow to do it…How it works…Debugging with pdbGetting readyHow to do it…How it works…See alsoCreating application factoriesGetting readyHow to do it…How it works…See alsoCreating the first simple testGetting readyHow to do it…How it works…See alsoWriting more tests for views and logicGetting readyHow to do it…How it works…See alsoIntegrating the nose2 libraryGetting readyHow to do it…See alsoUsing mocking to avoid external API accessGetting readyHow to do it…How it works…See alsoDetermining test coverageGetting readyHow to do it…How it works…See alsoUsing profiling to find bottlenecksGetting readyHow to do it…How it works…
Chapter 11: Deployment and Post-Deployment
Deploying with ApacheGetting readyHow to do it…How it works…See alsoDeploying with uWSGI and NginxGetting readyHow to do it…See alsoDeploying with Gunicorn and SupervisorGetting readyHow to do it…How it works…See alsoDeploying with TornadoGetting readyHow to do it…How it works…Using S3 storage for file uploadsGetting readyHow to do it…How it works…Managing and monitoring application performance with New RelicGetting readyHow to do it…How it works…See alsoInfrastructure and application monitoring with DatadogGetting readyHow to do it…See also
Chapter 12: Microservices and Containers
Containerization with DockerGetting readyHow to do it…How it works…See alsoOrchestrating containers with KubernetesGetting readyHow to do it…How it works…There’s more…See alsoGoing serverless with Google Cloud RunGetting readyHow to do it…How it works…See alsoContinuous deployment with GitHub ActionsGetting readyHow to do it…How it works…See also
Chapter 13: GPT with Flask
Technical requirementsAutomating text completion using GPTGetting readyHow to do it…How it works…See alsoImplementing chat using GPT (ChatGPT)Getting readyHow to do it…How it works…See alsoGenerating images using GPTGetting readyHow to do it…How it works…See also
Chapter 14: Additional Tips and Tricks
Implementing full-text search with ElasticsearchGetting readyHow to do it…How it works…See alsoWorking with signalsGetting readyHow to do it…How it works…See alsoUsing caching with your applicationGetting readyHow to do it…How it works…There’s more…See alsoImplementing email supportGetting readyHow to do it…How it works…There’s more…See alsoUnderstanding asynchronous operationsGetting readyHow to do it…How it works…See alsoWorking with CeleryGetting readyHow to do it…How it works…See also
Index
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Content preview from Flask Framework Cookbook - Third Edition

2 Templating with Jinja

This chapter will cover the basics of Jinja templating from the perspective of Flask. We will also learn how to design and develop applications with modular and extensible templates.

Information

If you have followed Flask or Jinja or this book’s previous editions, you might have noticed that, previously, this templating library was called Jinja2. The latest version of Jinja at the time of writing is version 3, and the authors/community have decided to call it just Jinja instead of confusingly continuing with Jinja2, Jinja3, and so on.

In Flask, we can write a complete web application without the need for a third-party templating engine. For example, have a look at the following code; this is a standalone, simple Hello ...

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Flask Framework Cookbook - Second Edition

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ISBN: 9781804611104

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Flask Framework Cookbook - Third Edition

by Shalabh Aggarwal

2

Templating with Jinja

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,
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