Fix *root_model_list

Author: luolingchun

flask_openapi3/request.py

@@ -4,7 +4,7 @@
 import json
 from json import JSONDecodeError
 from types import UnionType
-from typing import Any, Type, Optional, Dict, get_origin, get_args, Union
+from typing import Any, Type, Optional, Dict, get_origin, get_args, Union, TypeVar
 
 from flask import request, current_app, abort
 from pydantic import ValidationError, BaseModel, RootModel
@@ -144,7 +144,7 @@ def _validate_body(body: Type[BaseModel], func_kwargs: dict):
     if is_application_json(request.mimetype):
         if get_origin(body) == UnionType:
             root_model_list = [model for model in get_args(body)]
-            Body = RootModel[Union[*root_model_list]]  # type: ignore
+            Body = RootModel[Union[tuple(root_model_list)]]  # type: ignore
         else:
             Body = body  # type: ignore
         obj = request.get_json(silent=True)