Automatic JSON serialization for Flask

flask_automatic_jsonify.py

# Credit to:
# - http://derrickgilland.com/posts/automatic-json-serialization-in-flask-views/
# - https://blog.miguelgrinberg.com/post/customizing-the-flask-response-class
from flask import Response, Flask, jsonify


class AutoJSON(Response):
    @classmethod
    def force_type(cls, response, environ=None):
        """Override to convert list & dict returns to json."""
        if isinstance(response, (list, dict)):
            response = jsonify(response)
        return super(Response, cls).force_type(response, environ)


class CustomFlask(Flask):
    """Override Flask default response class."""
    response_cls = AutoJSON


app = CustomFlask(__name__)