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Add to SafariWhen comparing Flask vs Laravel 5, the Slant community recommends Flask for most people. In the question“What are the best backend web frameworks?” Flask is ranked 7th while Laravel 5 is ranked 8th. The most important reason people chose Flask is:
Flask is very easy to get up and going, with vanilla HTML or with bootstrap pieces. It doesn't take much lines of Python to load Flask to get headers working, etc, and since it's all modular you don't have to have something you don't want in your application.
Specs
Question Ranking
Pros
Pro Minimalist without losing power
Flask is very easy to get up and going, with vanilla HTML or with bootstrap pieces. It doesn't take much lines of Python to load Flask to get headers working, etc, and since it's all modular you don't have to have something you don't want in your application.
Pro Lots of resources available online
Flask is one of the most popular Python web frameworks, if not the most popular one. As such, there's plenty of guides, tutorials, and libraries available for it. A large number of important Python libraries, such as SQLAlchemy have libraries for Flask, which add valuable bindings to make the development process and the integration between these libraries and Flask as easy as possible.
Pro Extremely easy to build a quick prototype
Even though it's pretty minimalistic out of the box, Flask still provides the necessary tools to build a quick prototype for a web app right after a fresh install. With all the main components pretty much packed in the flask package, building a simple web app in a single Python file is as easy as it gets.
Pro Very flexible
Flask gives developers a lot of flexibility in how they develop their web applications.
For example, the choice of not having an ORM, but instead choosing one suited to the task, or another area where Flask gives a lot of options to developers is the templating. They can use Jinja2, Flask's default templating language or choose from a number of different templating languages they desire.
Pro Great documentation
The official documentation is very thorough and complete. Everything is explained in-depth and followed by extremely well-explained tutorials that tackle real-world problems.
Pro Able to use ORM or "true SQL"
Pro Good for building RESTful APIs
With migrations, powerful and intuitive Eloquent CRUD, resource routing, and simple JSON response out of the box, a complete REST API can be written in hours.
Pro Comes with an excellent built-in ORM
Laravel's Eloquent ORM is a simple and fast Object-Relational Mapping which helps with organizing the application's database. It supports the most popular databases (MySQL, Postgres, SQLite, etc.) out of the box.
Pro Good documentation
Laravel's documentation is thorough and very good. It covers everything and is very helpful to experienced and new users alike.
Pro Handles event queuing
Laravel supports event queuing and it does so in a very simple way. To create an event that should be queued just run:
php artisan handler:event SendPurchaseConfirmation --event=PodcastWasPurchased --queued
This creates a handler that implements the Illuminate\Contracts\Queue\ShouldBeQueued interface. Now when this handler is called it will automatically be queued by the event dispatcher.
Pro Comes with its own CLI
Laravel comes out of the box with it's own CLI called Artisan. With Artisan developers can do several different tasks such as migrating databases, seeding databases, clearing the cache and much much more.
Pro Easy to write web apps with authentication
Laravel comes with Authentication capabilities and a fully-powered Auth class out of the box. For passwords it uses bcrypt.
Pro Easy to learn
Pro Gives developers a great degree of freedom in how they set up their project structure
Laravel allows for free configuration and does not force developers to use a single project structure, instead they can change it to how they wish.
Pro Can use Symfony components
Laravel uses many libraries built for the Symfony PHP framework. Many of these libraries are well-built and have been tested by users before. Since the point of using a web framework is to shorten development time and to avoid reinventing the wheel for problems that have already been solved, then it's logical for a framework to use libraries already built to solve problems that have already been solved.
Pro Extremely powerful template system
Laravel has a powerful template system called Blade. It's quite similar to Twig or Moustache with lots of curly braces but the real power comes from the usage of PHP code directly in the view. Blade templates compile directly to raw PHP and are processed in the server when a request is made.
Pro Gulp tasks in the form of Laravel Elixir
In Laravel 5.0 they added Laravel Elixir, which provides an API for using Gulp tasks for Laravel applications. Elixir supports several CSS preprocessors and even some test tools. But it's still in the early stages of development and it will be developed even further in the following releases. With more methods and more Gulp tasks supported.
Pro Great Ecosystem
Has a great Ecosystem with SAAS like: Forge, Envoyer, Nova & from 3rd parties like oh-dear
Pro Great Community
Cons
Con Not async-friendly
Flask is explicitly not designed to handle async programming.
Con Setting up a large project requires some previous knowledge of the framework
Setting up a large project with Flask is not that easy considering how there's no "official" way of doing it. Blueprints are a useful tool in this regard but require some additional reading and are a bit tricky to get right for a beginner.
The lack of some defaults can also be problematic. Having to choose between different libraries for a certain task is never easy, especially if you have never worked with Flask before.
Con Threadlocals and globals used everywhere
The default way of creating applications in flask makes it hard to use reusable and clean code.
Con HTML-oriented, not API-oriented
Not necessarily designed for making APIs, though that is possible
Con Uses too much magic methods
It complicates debugging and autocompletion.
Con Bloated
While the speed doesn't seem to be an issue with it (on local tests), in production it may be hindered. The framework creates a ton of files and folders, some of which your app might not even use. Not good if you don't like having a ton of folders and rigid non-standard PHP folder structure for development.
Con Hard to use model properties
You need to check all model properties in database to know it exists, or declare all them manually.
Con Steep learning curve
While a lot of times you can write things in plain PHP, it will hinder you down the line when you want to use core features and find that you have to rewrite code which then causes issues throughout the app. Documentation is good, but you need to know what you are looking for and practical examples are non-existent. Many features have been updated throughout the versions in such a short time that tutorials you find online are confusing to sort through outdated tutorials and guides that no longer work or have been depreciated.
Con Poor performance
Con Follows bad design practices
Uses bad practices, like Singletons, Magic models, Middleware.
