Add missing types for GroupResult model of django-celery-results modu…

…le (#82)

django_celery_results-stubs/managers.pyi

@@ -4,7 +4,7 @@ from uuid import UUID
 
 from django.db import models
 from django.db.models.query import QuerySet
-from django_celery_results.models import TaskResult
+from django_celery_results.models import GroupResult, TaskResult
 
 class TaskResultManager(models.Manager[TaskResult]):
     def get_task(self, task_id: str) -> TaskResult: ...
@@ -24,3 +24,14 @@ class TaskResultManager(models.Manager[TaskResult]):
     ) -> TaskResult: ...
     def get_all_expired(self, expires: timedelta) -> QuerySet[TaskResult]: ...
     def delete_expired(self, expires: timedelta) -> None: ...
+
+class GroupResultManager(models.Manager[GroupResult]):
+    def get_group(self, group_id: str) -> GroupResult: ...
+    def store_group_result(
+        self,
+        content_type: str,
+        content_encoding: str,
+        group_id: str,
+        result: Optional[str],
+        using: Optional[str] = ...,
+    ) -> GroupResult: ...

django_celery_results-stubs/models.pyi

@@ -2,7 +2,7 @@ from datetime import datetime
 from typing import List, Optional, Tuple
 
 from django.db import models
-from django_celery_results.managers import TaskResultManager
+from django_celery_results.managers import GroupResultManager, TaskResultManager
 from typing_extensions import TypedDict
 
 ALL_STATES: List[str]
@@ -34,3 +34,18 @@ class TaskResult(models.Model):
     meta: models.TextField[Optional[str]]
     objects: TaskResultManager
     def as_dict(self) -> TaskResultDict: ...
+
+class GroupResultDict(TypedDict):
+    group_id: str
+    result: Optional[str]
+    date_done: datetime
+
+class GroupResult(models.Model):
+    group_id: models.CharField[str]
+    date_created: models.DateTimeField[datetime]
+    date_done: models.DateTimeField[datetime]
+    content_type: models.CharField[str]
+    content_encoding: models.CharField[str]
+    result: models.TextField[Optional[str]]
+    objects: GroupResultManager
+    def as_dict(self) -> GroupResultDict: ...