Add skip_none_values param

sqlalchemy_serializer/serializer.py

@@ -46,8 +46,12 @@ class SerializerMixin:
     decimal_format = "{}"
 
     # Serialize fields of the model defined as @property automatically
+    # TODO: Add this to the README file
     auto_serialize_properties: bool = False
 
+    # Skip None values
+    skip_none_values: bool = False
+
     def get_tzinfo(self):
         """
         Callback to make serializer aware of user's timezone. Should be redefined if needed
@@ -68,6 +72,7 @@ def to_dict(
         tzinfo=None,
         decimal_format=None,
         serialize_types=None,
+        skip_none_values=None,
     ):
         """
         Returns SQLAlchemy model's data in JSON compatible format
@@ -93,13 +98,15 @@ def to_dict(
             decimal_format=decimal_format or self.decimal_format,
             tzinfo=tzinfo or self.get_tzinfo(),
             serialize_types=serialize_types or self.serialize_types,
+            skip_none_values=skip_none_values or self.skip_none_values,
         )
         return s(self, only=only, extend=rules)
 
 
 Options = namedtuple(
     "Options",
-    "date_format datetime_format time_format decimal_format tzinfo serialize_types",
+    "date_format datetime_format time_format "
+    "decimal_format tzinfo serialize_types skip_none_values",
 )
 
 

tests/conftest.py

@@ -69,6 +69,7 @@ def func(
         decimal_format=DEFAULT_DECIMAL_FORMAT,
         tzinfo=None,
         serialize_types=(),
+        skip_none_values=None,
     ):
         return Serializer(
             date_format=date_format,
@@ -77,6 +78,7 @@ def func(
             decimal_format=decimal_format,
             tzinfo=tzinfo,
             serialize_types=serialize_types,
+            skip_none_values=skip_none_values,
         )
 
     return func

tests/datatypes/test_enum.py

@@ -11,6 +11,7 @@ def default_options():
         decimal_format="%.2f",
         tzinfo=None,
         serialize_types=None,
+        skip_none_values=None,
     )