diff --git a/apps/assets/models/group.py b/apps/assets/models/group.py
index c01a2a529..b9bf16f18 100644
--- a/apps/assets/models/group.py
+++ b/apps/assets/models/group.py
@@ -18,7 +18,7 @@ logger = logging.getLogger(__name__)
 class AssetGroup(models.Model):
     id = models.UUIDField(default=uuid.uuid4, primary_key=True)
     name = models.CharField(max_length=64, unique=True, verbose_name=_('Name'))
-    created_by = models.CharField(max_length=32, blank=True, verbose_name=_('Created by'))
+    created_by = models.CharField(max_length=32, null=True, blank=True, verbose_name=_('Created by'))
     date_created = models.DateTimeField(auto_now_add=True, null=True, verbose_name=_('Date created'))
     comment = models.TextField(blank=True, verbose_name=_('Comment'))
 
diff --git a/apps/assets/serializers.py b/apps/assets/serializers.py
index 024d88e22..bef50c5f0 100644
--- a/apps/assets/serializers.py
+++ b/apps/assets/serializers.py
@@ -13,7 +13,9 @@ class AssetGroupSerializer(BulkSerializerMixin, serializers.ModelSerializer):
     资产组序列化数据模型
     """
     assets_amount = serializers.SerializerMethodField()
-    assets = serializers.PrimaryKeyRelatedField(many=True, queryset=Asset.objects.all())
+    assets = serializers.PrimaryKeyRelatedField(
+        many=True, queryset=Asset.objects.all(), required=False
+    )
 
     class Meta:
         model = AssetGroup
@@ -22,7 +24,7 @@ class AssetGroupSerializer(BulkSerializerMixin, serializers.ModelSerializer):
 
     @staticmethod
     def get_assets_amount(obj):
-        return obj.asset_count
+        return obj.assets.all().count()
 
 
 class AssetUpdateSystemUserSerializer(serializers.ModelSerializer):