Connexion 3 is now in Alpha 🎉

• Connexion can now be used as middleware to supercharge any ASGI or WSGI compatible framework.
• Aiohttp support has been dropped in favor of an ASGI compatible AsyncApp built on top of Starlette.
• Connexion functionality is now pluggable by adding or removing middleware.
• Validation is now pluggable by content type, solving longstanding issues regarding endpoints with
  multiple content types and providing a pluggable interface.

Breaking changes

• Aiohttp support was dropped, use connexion.AsyncApp instead
• The options argument has been renamed to swagger_ui_options
• The uri_parser_class is now passed to the App or its add_api() method directly
  instead of via the options argument.
• The jsonifier is now passed to the App or its add_api() method instead of setting it
  as an attribute on the Api.
• Drop Flask 1.X support and support Flask 2.X async routes
• Drop Python 3.6 (and add Python 3.10) support
• connexion.request is now a Starlette Request instead of a Flask Request
• Route priority changed. The most specific route should now be defined first in the specification.
• We no longer guess a content type for response serialization if multiple are defined in the spec.
  We do take into account returned headers.
• Don't return 400 when read-only property is received
• Content type is now validated for requests and responses if defined in the spec
• The deprecated positions for x-body-name are no longer supported
• The parameter pass_context_arg_name has been removed. Context is now available as global
  request-level context, or can be passed in by defining a context_ parameter in your view function.
• The MethodViewResolver has been renamed to MethodResolver, and a new MethodViewResolver
  has been added to work with Flask's MethodView specifically.
• Built-in support for uWSGI has been removed. You can re-add this functionality using a custom middleware.

What's Changed

• Drop aiohttp support by @RobbeSneyders in #1491
• Add Python 3.10 in favor of 3.6 by @RobbeSneyders in #1494
• Add empty connexion middleware by @RobbeSneyders in #1502
• Extract Swagger UI functionality into middleware by @RobbeSneyders in #1496
• Add pre-commit hook by @RobbeSneyders in #1511
• Add routing middleware by @RobbeSneyders in #1497
• Extract security to middleware by @RobbeSneyders in #1514
• Remove myself (Rafael Caricio) as maintainer by @rafaelcaricio in #1517
• Merge V2 to main by @RobbeSneyders in #1518
• Fix deprecation warning for Validator.iter_errors by @jonasboecquaert in #1536
• Refactor routing into middleware-api-operation model by @RobbeSneyders in #1533
• Clean up operation classes by @RobbeSneyders in #1535
• Removed jsonschema version check by @jonasboecquaert in #1540
• Remove built-in support for uWSGI by @jacobstanly89 in #1544
• Fix for bug of the function is_json_mimetype() by @jacobstanly89 in #1541
• Use resolver in security middleware by @RobbeSneyders in #1553
• call as_view in methodresolver by @bluebrown in #1552
• Fix async tests by @Ruwann in #1558
• Add test for MethodViewResolver by @RobbeSneyders in #1559
• debug mode interaction for non-flask server by @thvu11 in #1556
• Add .git-blame-ignore-revs file with black commit by @RobbeSneyders in #1561
• Feature/method views args by @bluebrown in #1564
• Activate mypy check in pre-commit by @RobbeSneyders in #1560
• Remove "type: ignore" by using list(dict), not dict.keys() by @cclauss in #1575
• Merge v2 to main by @RobbeSneyders in #1579
• Resolve $ref referring to another $ref by @chibacchie in #1584
• Update json for Flask 2.3 by @RobbeSneyders in #1582
• Use Flask request_ctx instead of _request_ctx_stack by @RobbeSneyders in #1583
• setup.py: Update url by @jayvdb in #1586
• Extract JSON request body validation to middleware by @RobbeSneyders in #1588
• Remove AbstractSwaggerUIAPI class by @RobbeSneyders in #1589
• Removed internal variable pass_context_arg_name by @leonardofesta in #1568
• Explicitly support Flask async routes by @RobbeSneyders in #1592
• Extract boilerplate code into Routed base classes by @RobbeSneyders in #1590
• Move JSON response body validation to middleware by @RobbeSneyders in #1591
• Remove support for deprecated x-body-name position by @RobbeSneyders in #1600
• Avoid warning with jsonschema 4.16.0 by @gaetano-guerriero in #1601
• Add form data validator for validation middleware by @RobbeSneyders in #1595
• Flask apps only signal an exception on real server errors by @enerqi in #1611
• Move parameter validation to middleware by @RobbeSneyders in #1610
• Add async app by @RobbeSneyders in #1613
• Update examples for Connexion 3.0 by @RobbeSneyders in #1615
• Refactor decorators by @RobbeSneyders in #1618
• Switch to own maintained version of swagger-ui by @RobbeSneyders in #1619
• Expose additional context by @RobbeSneyders in #1620
• Implement user facing interface for ConnexionMiddleware by @RobbeSneyders in #1621
• Enable enforcing defaults by @RobbeSneyders in #1616
• Cache operation body definition by @RobbeSneyders in #1626
• Coerce types only in uri parser by @RobbeSneyders in #1627
• Introduce poetry by @RobbeSneyders in #1628
• Bump httpx version to 0.23 to mitigate GHSA-h8pj-cxx2-jfg2 by @RobbeSneyders in #1632
• Refactor tests by @RobbeSneyders in #1631
• Define request interface and align WSGI and ASGI by @RobbeSneyders in #1636
• Feature/request context by @RobbeSneyders in #1639
• Add error handlers for AsyncApp by @RobbeSneyders in #1640
• Make tests framework agnostic by @RobbeSneyders in #1634
• Bump starlette version by @Ruwann in #1641
• Bump a2wsgi and drop monkeypatch by @RobbeSneyders in #1647
• Update NumberConverter regex to match new Werkzeug behavior (v3) by @RobbeSneyders in #1644
• Re-add tests for multiple and mixed file uploads by @RobbeSneyders in #1642
• Add support for relative refs in spec by @RobbeSneyders in #1648
• Clean up errors and fix hierarchy by @RobbeSneyders in #1649
• Enforce required RequestBody by @RobbeSneyders in #1652
• Create abstract validator classes by @RobbeSneyders in #1653
• Enable response mimetype validation for non-error responses by @RobbeSneyders in #1654
• Don't return 400 when read-only property is provided by @RobbeSneyders in #1655
• Add jsonifier as argument to app / api by @RobbeSneyders in #1656
• Add high-level documentation for 3.0 by @RobbeSneyders in #1646
• Run release pipeline for pre-releases as well by @RobbeSneyders in #1658
• Fix filter pattern in release pipeline by @RobbeSneyders in #1659

New Contributors

• @jacobstanly89 made their first contribution in #1544
• @bluebrown made their first contribution in #1552
• @thvu11 made their first contribution in #1556
• @chibacchie made their first contribution in #1584
• @jayvdb made their first contribution in #1586
• @leonardofesta made their first contribution in #1568
• @gaetano-guerriero made their first contribution in #1601
• @enerqi made their first contribution in #1611

Full Changelog: 2.13.0...3.0.0a1