Fix None parsing (#83)

* Fix None parsing

* Fix lint

Author: BTheunissen

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "shaped-target-clickhouse"
-version = "0.1.20"
+version = "0.1.21"
 description = "`target-clickhouse` is a Singer target for clickhouse, built with the Meltano Singer SDK."
 readme = "README.md"
 authors = ["Ben Theunissen"]
@@ -49,6 +49,7 @@ ignore = [
     "TCH003",
     "ANN202",
     "C901",
+    "TRY201", # Use of bare 'except'
 ]
 select = ["ALL"]
 src = ["target_clickhouse"]

target_clickhouse/sinks.py

@@ -199,6 +199,9 @@ def pre_validate_for_string_type(
         if not isinstance(expected_type, list):
             expected_type = [expected_type]
 
+        if "null" in expected_type and value is None:
+            continue
+
         if "object" in expected_type and isinstance(value, dict):
             pre_validate_for_string_type(
                 value,