fixed issue if config is none

docs/usage/etl.md

@@ -24,7 +24,11 @@ df.write_parquet("source.parquet")
 source_df = source_parquet("source.parquet")
 
 # Upsert to a target table
-upsert_scd_type_1(dedup_df, "target_table")
+upsert_scd_type_1(
+    table_uri="target_table",
+    df=source_df,
+    primary_key_columns="id"
+)
 ```
 
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "msfabricutils"
-version = "0.3.0"
+version = "0.3.1"
 description = "A Python library exposes additional functionality to work with Python Notebooks in Microsoft Fabric."
 authors = [
     { name = "Jimmy Jensen" },

src/msfabricutils/etl/sinks/delta_table.py

@@ -51,12 +51,16 @@ def upsert_scd_type_1(
     dynamic_audit_columns = config.get_dynamic_audit_columns() if config else []
     static_audit_columns = config.get_static_audit_columns() if config else []
 
-    if exclude_columns is None:
-        exclude_columns = []
-
     if isinstance(primary_key_columns, str):
         primary_key_columns = [primary_key_columns]
-    primary_key_columns = [config.normalization_strategy(column) for column in primary_key_columns]
+
+    if config:
+        primary_key_columns = [
+            config.normalization_strategy(column) for column in primary_key_columns
+        ]
+
+    if exclude_columns is None:
+        exclude_columns = []
 
     if isinstance(exclude_columns, str):
         exclude_columns = [exclude_columns]