feat: 获取子集的性能优化及删除提示

apps/utils/mixins.py

@@ -171,6 +171,8 @@ class BulkDestroyModelMixin(DestroyModelMixin):
                 raise ValidationError(**PKS_ERROR)
         else:
             instance = self.get_object()
+            if hasattr(instance, "parent") and instance.__class__.objects.filter(parent=instance).exists():
+                raise ParseError('存在子级,无法删除')
             self.perform_destroy(instance)
         return Response(status=204)
 

apps/utils/queryset.py

@@ -52,9 +52,15 @@ def get_child_queryset2(obj, hasParent=True):
     obj实例
     数据表需包含parent字段
     是否包含父默认True
+    若有parent_link字段则进行性能优化
     '''
     cls = type(obj)
     queryset = cls.objects.none()
+    if hasattr(cls, 'parent_link'):
+        queryset = cls.objects.filter(parent_link__contains=obj.id)
+        if hasParent:
+            queryset = queryset | cls.objects.filter(pk=obj.id)
+        return queryset
     if hasParent:
         queryset = cls.objects.filter(pk=obj.id)
     child_queryset = cls.objects.filter(parent=obj)