Book Image

Mastering Flask

By : Jack Stouffer
Book Image

Mastering Flask

By: Jack Stouffer

Overview of this book

Starting from a simple Flask app, this book will walk through advanced topics while providing practical examples of the lessons learned. After building a simple Flask app, a proper app structure is demonstrated by transforming the app to use a Model-View-Controller (MVC) architecture. With a scalable structure in hand, the next chapters use Flask extensions to provide extra functionality to the app, including user login and registration, NoSQL querying, a REST API, an admin interface, and more. Next, you’ll discover how to use unit testing to take the guesswork away from making sure the code is performing as it should. The book closes with a discussion of the different platforms that are available to deploy a Flask app on, the pros and cons of each one, and how to deploy on each one.
Table of Contents (20 chapters)
Mastering Flask
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

GET requests


For some of our GET, PUT, and DELETE requests, our API will need the ID of the Post to modify. The add_resource method can take multiple routes, so let's add the second route that captures the passed ID:

   rest_api.add_resource(
        PostApi,
        '/api/post',
        '/api/post/<int:post_id>',
        endpoint='api'
    )

Now the get method will need to accept post_id as a keyword argument:

class PostApi(Resource):
    def get(self, post_id=None):
        if post_id:
            return {"id": post_id}
        
        return {"hello": "world"}

The data to be sent to the client must be a representation of the Post objects in JSON, so how will our Post objects be translated? Flask Restful provides a way of translating any object to JSON through the fields object and the marshal_with function decorator.

Output formatting

The output format is defined by creating a dictionary of field objects that represent basic types. The key of the field defines what attribute the field...