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

PUT requests


As listed in the table at the beginning of this chapter, PUT requests are for changing the values of existing resources. Like the post method, the first thing to be done is to create a new parser in parsers.py:

post_put_parser = reqparse.RequestParser()
post_put_parser.add_argument(
    'token',
    type=str,
    required=True,
    help="Auth Token is required to edit posts"
)
post_put_parser.add_argument(
    'title',
    type=str
)
post_put_parser.add_argument(
    'text',
    type=str
)
post_put_parser.add_argument(
    'tags',
    type=str,
    action='append'
)

The logic for the put method is very similar to the post method. The main difference is that each change is optional and any request that does not provide a post_id is denied:

from .parsers import (
    post_get_parser,
    post_post_parser,
    post_put_parser
)


class PostApi(Resource):
    @marshal_with(post_fields)
    def get(self, post_id=None):
        …

    def post(self, post_id=None):
        …

    def...