fix(API): Updating assets via the API should preserve ownership configuration (#27364)

superset/commands/utils.py

@@ -35,7 +35,7 @@ if TYPE_CHECKING:
     from superset.connectors.sqla.models import BaseDatasource
 
 
-def populate_owners(
+def populate_owner_list(
     owner_ids: list[int] | None,
     default_to_user: bool,
 ) -> list[User]:
@@ -62,6 +62,25 @@ def populate_owners(
     return owners
 
 
+def compute_owner_list(
+    current_owners: list[User] | None,
+    new_owners: list[int] | None,
+) -> list[User]:
+    """
+    Helper function for update commands, to properly handle the owners list.
+    Preserve the previous configuration unless included in the update payload.
+
+    :param current_owners: list of current owners
+    :param new_owners: list of new owners specified in the update payload
+    :returns: Final list of owners
+    """
+    current_owners = current_owners or []
+    owners_ids = (
+        [owner.id for owner in current_owners] if new_owners is None else new_owners
+    )
+    return populate_owner_list(owners_ids, default_to_user=False)
+
+
 def populate_roles(role_ids: list[int] | None = None) -> list[Role]:
     """
     Helper function for commands, will fetch all roles from roles id's