dosubot[bot] commented on issue #34422:
URL: https://github.com/apache/superset/issues/34422#issuecomment-3154650512
<!-- Answer -->
Superset 5.x removed support for customizing the main IndexView via
FAB_INDEX_VIEW in superset_config.py—a breaking change from 4.x. That config is
now ignored, so even if your class is defined, Superset won’t use it, which
leads to the AttributeError you’re seeing. The supported way to customize
IndexView is to use FLASK_APP_MUTATOR: define your custom IndexView class, then
set appbuilder.indexview to it inside a mutate_app function, and assign that
function to FLASK_APP_MUTATOR in your config. Example:
```python
from flask_appbuilder import expose, IndexView
from superset.typing import FlaskResponse
class MyCustomIndexView(IndexView):
@expose('/')
def index(self) -> FlaskResponse:
# your custom logic here
pass
def mutate_app(app):
from superset.extensions import appbuilder
appbuilder.indexview = MyCustomIndexView
FLASK_APP_MUTATOR = mutate_app
```
Remove any FAB_INDEX_VIEW config. If you’re running in Docker Compose, place
your config at `/app/docker/pythonpath_dev/superset_config_docker.py` and
restart your containers so it’s picked up. If you still see errors, check your
logs for import or syntax errors in your config file—any such error will
prevent your class from being available. More details and examples are in these
threads: [issue #34441](https://github.com/apache/superset/issues/34441),
[discussion #34530](https://github.com/apache/superset/discussions/34530).
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