warn for missing partitions

apps/vinyl/src/assets.py

@@ -232,7 +232,9 @@ def new_deals(
     },
     ins={"partitions": dg.AssetIn(key=new_deals.key)},
     output_required=False,
-    automation_condition=dg.AutomationCondition.eager().without(~dg.AutomationCondition.any_deps_missing())
+    automation_condition=dg.AutomationCondition.eager().without(
+        ~dg.AutomationCondition.any_deps_missing()
+    ),
 )
 def good_deals(
     context: dg.AssetExecutionContext,
@@ -242,6 +244,9 @@ def good_deals(
     parsed_partition_keys = parse_partition_keys(context, "partitions")
     ic(parsed_partition_keys)
 
+    if not partitions:
+        logger.warning("Partitions are empty!")
+        return
     df = pl.concat(partitions.values(), how="vertical_relaxed").collect()
 
     counts = dict(df.group_by("source").len().iter_rows())