chore(python): make all model fields optional by default

Part of #16
Relate to #13

Author: php-coder

examples/python/fastapi/postgres/routes.py

@@ -10,10 +10,10 @@
 router = APIRouter()
 
 class CreateCategoryDto(BaseModel):
-    name: str
-    name_ru: str
-    slug: str
-    user_id: int
+    name: str | None = None
+    name_ru: str | None = None
+    slug: str | None = None
+    user_id: int | None = None
 
 
 @router.get('/v1/categories/count')

src/templates/routes.py.ejs

@@ -114,7 +114,7 @@ function query2dto(parser, method) {
 function dto2model(dto) {
 	let result = `class ${dto.name}(BaseModel):\n`;
 	dto.props.forEach(prop => {
-		result += `    ${prop.name}: ${prop.type}\n`
+		result += `    ${prop.name}: ${prop.type} | None = None\n`
 	});
 	return result;
 }