polars io manager ignores partition_by metadata

apps/other/src/assets.py

@@ -1,5 +1,6 @@
 import polars as pl
 
+import dagster as dg
 from dagster import (
     AssetIn,
     DailyPartitionsDefinition,
@@ -173,3 +174,11 @@ def asset_multi_3(context, asset_multi_1):
     return pl.scan_parquet(
         f"{storage_dir}/{asset_key}/*/*.parquet", extra_columns="ignore"
     ).filter(pl.col("date").is_in(keep_dates))
+
+
+@asset(io_manager_key="polars_parquet_io_manager", metadata={"partition_by": ["b"]})
+def dummy_asset():
+    yield dg.Output(
+        pl.DataFrame({"a": [1, 2, 3], "b": [4, 5, 6], "c": [7, 8, 9]}),
+        metadata={"partition_by": ["c"]},
+    )