Make rest_framework.SchemaField aware of allow_null attribute

Author: surenkov

django_pydantic_field/rest_framework.py

@@ -69,9 +69,12 @@ def __init__(
         config: t.Optional["base.ConfigType"] = None,
         **kwargs,
     ):
-        self.schema = field_schema = self._wrap_schema(schema, config)
+        nullable = kwargs.get("allow_null", False)
+
+        self.schema = field_schema = self._wrap_schema(schema, config, nullable)
         self.decoder = base.SchemaDecoder(field_schema)
         self.export_params = self._extract_export_kwargs(kwargs, dict.pop)
+
         super().__init__(**kwargs)
 
     def to_internal_value(self, data) -> t.Optional["base.ST"]:

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = django-pydantic-field
-version = 0.1.6
+version = 0.1.7
 url = https://github.com/surenkov/django-pydantic-field
 
 description = Django JSONField with Pydantic models as a Schema

tests/test_drf_adapters.py

@@ -26,15 +26,21 @@ def test_schema_field():
 
     assert field.to_representation(existing_instance) == expected_encoded
     assert field.to_internal_value(expected_encoded) == existing_instance
+    with pytest.raises(serializers.ValidationError):
+        field.to_internal_value(None)
+    with pytest.raises(serializers.ValidationError):
+        field.to_internal_value("null")
 
 
 def test_field_schema_with_custom_config():
-    field = rest_framework.SchemaField(InnerSchema, exclude={"stub_int"})
+    field = rest_framework.SchemaField(InnerSchema, allow_null=True, exclude={"stub_int"})
     existing_instance = InnerSchema(stub_str="abc", stub_list=[date(2022, 7, 1)])
     expected_encoded = {"stub_str": "abc", "stub_list": [date(2022, 7, 1)]}
 
     assert field.to_representation(existing_instance) == expected_encoded
     assert field.to_internal_value(expected_encoded) == existing_instance
+    assert field.to_internal_value(None) is None
+    assert field.to_internal_value("null") is None
 
 
 def test_serializer_marshalling_with_schema_field():