Unhandled exceptions in a RESTful API are not getting jsonify'ed

python rest exception resources flask

This because Flask-Restful monkeypatch default Flask.handle_user_exception which will have specific logic for Flask-Restful endpoints and default behaviour for other endpoints.

python rest exception resources flask

Flask-Restful has its own error handler, the JSON output that you are seeing from /test2 is being generated by the extension itself.

You can override Flask-Restful's exception if you register a new exception handler via Flask's handle_exception call.

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