Signals Signals and Flask’s Request Context Decorator Based Signal Subscriptions Core Signals Pluggable Views Basic Principle Method Hints Method Based Dispatching Decorating Views Method Views for APIs Fabric Using SQLite 3 with Flask SQLAlchemy in Flask Uploading Files Caching View Decorators Form Validation with WTForms Template Inheritance Message Flashing AJAX with jQuery Custom Error Pages Lazily Loading need and nothing you don’t. By default, Flask does not include a database abstraction layer, form validation or anything else where different libraries already exist that can handle that. Instead, Flask supports

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 1.13 Pluggable Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . need and nothing you don’t. By default, Flask does not include a database abstraction layer, form validation or anything else where different libraries already exist that can handle that. Instead, Flask supports as if it was implemented in Flask itself. Numerous extensions provide database integration, form validation, upload handling, various open authentication technologies, and more. Flask may be “micro”, but

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views, giving you easy access to multiple HTTP methods just by defining methods on your resource data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse. from flask_restful import reqparse parser = reqparse.RequestParser() Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views [http://flask.pocoo.org/docs/views/], giving you easy access to multiple HTTP methods just data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse [http://docs.python.org/dev/library/argparse.html]. from Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views, giving you easy access to multiple HTTP methods just by defining methods on your resource data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse. from flask_restful import reqparse parser = reqparse.RequestParser() Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views, giving you easy access to multiple HTTP methods just by defining methods on your resource data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse. from flask_restful import reqparse parser = reqparse.RequestParser() Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views [http://flask.pocoo.org/docs/views/], giving you easy access to multiple HTTP methods just data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse [http://docs.python.org/dev/library/argparse.html]. from Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views [http://flask.pocoo.org/docs/views/], giving you easy access to multiple HTTP methods just data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse [http://docs.python.org/dev/library/argparse.html]. from Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views [http://flask.pocoo.org/docs/views/], giving you easy access to multiple HTTP methods just data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse [http://docs.python.org/dev/library/argparse.html]. from Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl

main building block provided by Flask-RESTful are resources. Resources are built on top of Flask pluggable views, giving you easy access to multiple HTTP methods just by defining methods on your resource data), it’s still a pain to validate form data. Flask-RESTful has built-in support for request data validation using a library similar to argparse. from flask_restful import reqparse parser = reqparse.RequestParser() Using the reqparse module also gives you sane error messages for free. If an argument fails to pass validation, Flask-RESTful will respond with a 400 Bad Request and a response highlighting the error. $ curl