Add support for ValidationError argument params

This isn't part of released django-rest-framework, but has been merged upstream.

Upstream PR: encode/django-rest-framework#8863

rest_framework-stubs/exceptions.pyi

@@ -1,12 +1,11 @@
 from collections.abc import Sequence
 from typing import Any
 
-from typing_extensions import TypeAlias
-
 from django.http import HttpRequest, JsonResponse
 from django_stubs_ext import StrOrPromise
 from rest_framework.renderers import BaseRenderer
 from rest_framework.request import Request
+from typing_extensions import TypeAlias
 
 def _get_error_details(data: Any, default_code: str | None = ...) -> Any: ...
 def _get_codes(detail: Any) -> Any: ...
@@ -28,7 +27,12 @@ class APIException(Exception):
     def get_codes(self) -> Any: ...
     def get_full_details(self) -> Any: ...
 
-class ValidationError(APIException): ...
+class ValidationError(APIException):
+    default_params: Mapping[str, Any]
+    def __init__(
+        self, detail: _Detail | None = ..., code: str | None = ..., params: Mapping[str, Any] | None = ...
+    ) -> None: ...
+
 class ParseError(APIException): ...
 class AuthenticationFailed(APIException): ...
 class NotAuthenticated(APIException): ...