Fix lint errors

Author: mgax

django_tasks/backends/database/admin.py

@@ -1,19 +1,28 @@
 from typing import List, Optional
 
 from django.contrib import admin
+from django.db.models import QuerySet
 from django.http import HttpRequest
 
 from django_tasks.task import ResultStatus
 
 from .models import DBTaskResult
 
 
-def reenqueue(modeladmin: admin.ModelAdmin, request, queryset):
+def reenqueue(
+    modeladmin: admin.ModelAdmin,
+    request: HttpRequest,
+    queryset: QuerySet[DBTaskResult],
+) -> None:
     tasks = queryset.update(status=ResultStatus.NEW)
     modeladmin.message_user(request, f"Rescheduled {tasks} tasks.", "SUCCESS")
 
 
-def duplicate(modeladmin: admin.ModelAdmin, request, queryset):
+def duplicate(
+    modeladmin: admin.ModelAdmin,
+    request: HttpRequest,
+    queryset: QuerySet[DBTaskResult],
+) -> None:
     tasks = DBTaskResult.objects.bulk_create(
         old_task.duplicate() for old_task in queryset
     )

django_tasks/backends/database/models.py

@@ -1,6 +1,6 @@
 import logging
 import uuid
-from typing import TYPE_CHECKING, Any, Generic, Optional, TypeVar
+from typing import TYPE_CHECKING, Any, Generic, Optional, Self, TypeVar
 
 from django.core.exceptions import SuspiciousOperation
 from django.db import models
@@ -170,7 +170,7 @@ def set_failed(self, exc: BaseException) -> None:
             self.result = None
         self.save(update_fields=["status", "finished_at", "result"])
 
-    def duplicate(self):
+    def duplicate(self) -> Self:
         return type(self)(
             args_kwargs=self.args_kwargs,
             priority=self.priority,