fix works asset

apps/vinyl/src/assets.py

@@ -127,17 +127,18 @@ def cleaned_deals(
     deps=[cleaned_deals],
     io_manager_key="polars_parquet_io_manager",
     automation_condition=dg.AutomationCondition.eager(),
+    output_required=False,
 )
-def works(context: dg.AssetExecutionContext) -> pl.DataFrame | None:
+def works(context: dg.AssetExecutionContext) -> Iterator[dg.Output[pl.DataFrame]]:
     """Aggregate works from cleaned deals."""
     partitions = context.instance.get_materialized_partitions(cleaned_deals.key)
     ic(partitions)
     logger.info("Works", partitions=partitions)
     dfs = list(load_partitions(context, cleaned_deals.key, partitions))
+    ic(len(dfs))
     if dfs:
         columns = ["artist", "title", "release"]
-        return pl.concat(dfs, how="vertical_relaxed").select(columns).unique()
-    return None
+        yield dg.Output(pl.concat(dfs, how="vertical_relaxed").select(columns).unique())
 
 
 @asset(