alexandrusoare commented on code in PR #45451:
URL: https://github.com/apache/superset/pull/45451#discussion_r4324786949
##########
superset/utils/filters.py:
##########
@@ -176,3 +177,118 @@ def guest_embedded_dashboard_filter() ->
Optional[ColumnElement[bool]]:
# dashboards, never a plain internal id.
conditions.append(and_(Dashboard.id.in_(int_ids),
Dashboard.embedded.any()))
return or_(*conditions) if conditions else false()
+
+
+def apply_extra_access_exclusions(
+ query: "Query",
+ asset_kind: str,
+ id_column: "ColumnElement[Any]",
+) -> "Query":
+ """Withhold the asset IDs an ``EXTRA_ACCESS_QUERY_EXCLUSIONS`` hook names.
+
+ ``EXTRA_ACCESS_QUERY_FILTERS`` can only widen a result set -- its
conditions
+ are OR'd with the role paths -- so a deployment with its own notion of a
+ withheld asset cannot express that through it. This is the matching AND
NOT.
+
+ Returns ``query`` unchanged when no hook is configured or there is no
+ authenticated user, so the default build is unaffected.
+ """
+
+ clause = extra_access_exclusion_clause(asset_kind, id_column)
+ return query if clause is None else query.filter(clause)
+
+
+def extra_access_exclusion_clause(
+ asset_kind: str,
+ id_column: "ColumnElement[Any]",
+) -> Optional["ColumnElement[bool]"]:
+ """The ``NOT EXISTS`` clause for an exclusion hook, or None when inactive.
+
+ Deliberately ``NOT EXISTS`` rather than ``NOT IN``: a hook subquery that
+ yields a single NULL id makes ``NOT IN`` evaluate to NULL for every row,
+ which would silently empty the entire list -- for admins too. ``NOT
EXISTS``
+ simply does not match a NULL, so a malformed hook withholds nothing instead
+ of everything.
+ """
+ hook, _reason = _extra_access_exclusion_entry(asset_kind)
+ if not hook:
+ return None
+
+ from superset.utils.core import get_user_id
+
+ user_id = get_user_id()
+ if not user_id:
Review Comment:
Good catch — that was the unsafe direction for a withholding rule, and not
deliberate. The hook is now consulted with None rather than skipped
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