show key when none

Author: kevinjqliu

pyiceberg/types.py

@@ -64,9 +64,9 @@
 
 def transform_dict_value_to_str(dict: Dict[str, Any]) -> Dict[str, str]:
     """Transform all values in the dictionary to string. Raise an error if any value is None."""
-    for value in dict.values():
+    for key, value in dict.items():
         if value is None:
-            raise ValueError("None type is not a supported value in properties")
+            raise ValueError(f"None type is not a supported value in properties: {key}")
     return {k: str(v) for k, v in dict.items()}
 
 

tests/catalog/test_base.py

@@ -678,4 +678,4 @@ def test_table_properties_raise_for_none_value(catalog: InMemoryCatalog) -> None
     property_with_none = {"property_name": None}
     with pytest.raises(ValidationError) as exc_info:
         _ = given_catalog_has_a_table(catalog, properties=property_with_none)
-    assert "None type is not a supported value in properties" in str(exc_info.value)
+    assert "None type is not a supported value in properties: property_name" in str(exc_info.value)

tests/catalog/test_sql.py

@@ -951,4 +951,4 @@ def test_table_properties_raise_for_none_value(
     property_with_none = {"property_name": None}
     with pytest.raises(ValidationError) as exc_info:
         _ = catalog.create_table(random_identifier, table_schema_simple, properties=property_with_none)
-    assert "None type is not a supported value in properties" in str(exc_info.value)
+    assert "None type is not a supported value in properties: property_name" in str(exc_info.value)

tests/integration/test_writes.py

@@ -688,4 +688,4 @@ def test_table_properties_raise_for_none_value(
         _ = _create_table(
             session_catalog, identifier, {"format-version": format_version, **property_with_none}, [arrow_table_with_null]
         )
-    assert "None type is not a supported value in properties" in str(exc_info.value)
+    assert "None type is not a supported value in properties: property_name" in str(exc_info.value)

tests/table/test_init.py

@@ -1107,4 +1107,4 @@ def test_table_properties_raise_for_none_value(example_table_metadata_v2: Dict[s
     example_table_metadata_v2 = {**example_table_metadata_v2, "properties": property_with_none}
     with pytest.raises(ValidationError) as exc_info:
         TableMetadataV2(**example_table_metadata_v2)
-    assert "None type is not a supported value in properties" in str(exc_info.value)
+    assert "None type is not a supported value in properties: property_name" in str(exc_info.value)