feat: added omit defaults to base class

Author: mikewolfd

msgspec_schemaorg/base.py

@@ -7,7 +7,7 @@
 from msgspec import field
 
 
-class SchemaOrgBase(msgspec.Struct, frozen=True):
+class SchemaOrgBase(msgspec.Struct, frozen=True, omit_defaults=True):
     """
     Base class for all Schema.org models with JSON-LD fields.
     

msgspec_schemaorg/generate.py

@@ -599,7 +599,7 @@ def generate_struct_code(self, schema_class_id: str) -> tuple[str, list[str]]:
             code.append(f'    """{class_description}"""')
 
         # Add type field with this class's name as the default value
-        code.append(f'    type: Optional[str] = field(default="{class_name}", name="@type")')
+        code.append(f'    type: str = field(default_factory=lambda: "{class_name}", name="@type")')
 
         # Add fields and collect dependencies
         for prop_name, prop_info in properties.items():