adamchainz/flask-marshmallow

Flask + marshmallow for beautiful APIs

Flask-Marshmallow

Flask + marshmallow for beautiful APIs

Flask-Marshmallow is a thin integration layer for Flask (a Python web framework) and marshmallow (an object serialization/deserialization library) that adds additional features to marshmallow, including URL and Hyperlinks fields for HATEOAS-ready APIs. It also (optionally) integrates with Flask-SQLAlchemy.

Get it now

pip install flask-marshmallow

Create your app.

from flask import Flask, jsonify
from flask_marshmallow import Marshmallow

app = Flask(__name__)
ma = Marshmallow(app)

Write your models.

from your_orm import Model, Column, Integer, String, DateTime

class User(Model):
    email = Column(String)
    password = Column(String)
    date_created = Column(DateTime, auto_now_add=True)

Define your output format with marshmallow.

class UserSchema(ma.Schema):
    class Meta:
        # Fields to expose
        fields = ('email', 'date_created', '_links')
    # Smart hyperlinking
    _links = ma.Hyperlinks({
        'self': ma.URLFor('author_detail', id='<id>'),
        'collection': ma.URLFor('authors')
    })

user_schema = UserSchema()
users_schema = UserSchema(many=True)

Output the data in your views.

@app.route('/api/users/')
def users():
    all_users = User.all()
    result = users_schema.dump(all_users)
    return jsonify(result.data)
    # OR
    # return user_schema.jsonify(all_users)

@app.route('/api/users/<id>')
def user_detail(id):
    user = User.get(id)
    return user_schema.jsonify(user)
# {
#     "email": "[email protected]",
#     "date_created": "Fri, 25 Apr 2014 06:02:56 -0000",
#     "_links": {
#         "self": "/api/authors/42",
#         "collection": "/api/authors/"
#     }
# }

http://flask-marshmallow.readthedocs.io/

Learn More

To learn more about marshmallow, check out its docs.

Project Links

• Docs: http://flask-marshmallow.rtfd.org/
• Changelog: http://flask-marshmallow.readthedocs.io/en/latest/changelog.html
• PyPI: https://pypi.python.org/pypi/flask-marshmallow
• Issues: https://github.com/marshmallow-code/flask-marshmallow/issues

License

MIT licensed. See the bundled LICENSE file for more details.