When comparing Yii vs FastAPI, the Slant community recommends FastAPI for most people. In the question“What are the best backend web frameworks?” FastAPI is ranked 4th while Yii is ranked 21st. The most important reason people chose FastAPI is:
It has a simple but powerful dependency injection system, it can be used to handle authentication, per-user rate limiting, authorization controls (e.g. with roles), etc.
Specs
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Pros
Pro Rapid development through code scaffolding
Yii takes care of repetitive tasks through Gii, a web-based scaffolding tool. Gii takes care of code generation and creating code templates for:
- Models
- Controllers
- Forms
- Modules
- Extensions
- CRUD controller actions and views
- There are a lot of scaffolding templates made by community for Gii, that improve generated code functionality by a lot.
- Gii is very easy to extend yourself.
Pro Comes with important security standarts
Since security is a crucial part of any application, Yii comes with great security features out of the box to help developers create a secure and reliable application. These security features contain but are not restricted to:
- Input validation
- Output filtering
- Features against SQL injection
- Cross-site scripting prevention
Pro Highly extensible
Yii is built to be extremely extensible. Virtually every component of the framework can be extended programmatically. For example, if you want to add a unique id to your views, it's very easy to do:
namespace app\components;
class View extends yii\web\View {
public $bodyId;
/* Yii allows you to add magic getter methods by prefacing method names with "get" */
public function getBodyIdAttribute() {
return ($this->bodyId != '') ? 'id="' . $this->bodyId . '"' : '';
}
}
Pro Integrated with a testing framework
Yii makes use of Codeception, a great PHP testing framework that helps developers run their tests. They can be unit, functional or acceptance tests since Codeception supports them all.
Pro Lots of plugins available
Yii has about 2000 addons hosted on Yii's official website. These addons significantly decrease development time and increase the developer's efficiency.
Pro License
Yii is free and open source and is distributed under the BSD License.
Pro Strong community support
Yii has a strong and rather large community behind it. This is proven by the great number of blog posts, tutorials, guides and reviews on the Yii framework as well as the great number of extensions developed for it.
Pro Easy to install
Yii uses Composer to handle it's dependency installation. This is rather easy and not very time consuming, although it should be noted that Composer is very resource-intensive considering what it's job is. But that is not really Yii's fault.
Pro Best framework for CRUD operation
Yii Framework Provides most of features require for crud functionalities like GridView, Listview and DetailView (with jquery search and validation functions) by generating using GII.
Pro Highly extensible without effort
Pro Dependency injection
It has a simple but powerful dependency injection system, it can be used to handle authentication, per-user rate limiting, authorization controls (e.g. with roles), etc.
Pro Standards
It is based on standards: OpenAPI, JSON Schema and OAuth 2.0.
Pro Data validation
It validates the data using the types you declared. Even in deeply nested JSON requests.
Pro High-performance
It's based on Starlette and Pydantic, so, it's one of the fastest Python frameworks.
Pro Editor completion
It is based on Python type declarations, so, editors and tools can give great support. Including type checks and autocompletion everywhere.
Pro One of the fastest growing communities
Pro Fast is really fast (!)
It's easy to develop API based applications in Python on deadlines for Android and IOS Development.
Pro Automatic docs
It generates interactive API documentation automatically from your code.
Pro Database independent
It's independent of database or ORM, but compatible with all of them. Including relational databases and NoSQL.
Pro Async IO / optional
It's based on Async IO, which gives it high concurrency. But you can use non-async libraries and it runs them appropriately.
Pro World class documentation
It has some of the best documentation of any framework.
Pro WebSockets
Because it's an async framework, it can handle async-native protocols like WebSockets.
Pro OAuth 2.0
It has integrated support for OAuth 2.0. Including declaring required scopes per endpoint. So, you can easily integrate it with external OAuth 2.0 providers or build your own with it.
Pro Background tasks
Included support for background tasks, thanks to being based on Starlette.
Pro Supports GraphQL
Python's graphene library is included as an optional dependency meaning that GraphQL API's are supported out of the box, with no additional tweaking needed.
Cons
Con Can be hard for beginners
Since Yii requires developers to write code following certain rules, or in other words, it requires developers to follow the "Yii way of doing things" it can be hard for beginners to warm up to it and start using it right away.
Con Not very good at many to many relations
(but there is a good plugin, namely CAdvancedArBehavior extension to do this)
Con Smaller community
Since FastAPI is relatively new, its community is smaller than Django Rest Framework. But it can grow with time.