[前台]修改小组逻辑,修正之前加入无需申请的小组的时候错误的提示,无需申请的小组取消申请列表栏

group/serializers.py

@@ -21,7 +21,7 @@ class EditGroupSerializer(serializers.Serializer):
 
 class CreateJoinGroupRequestSerializer(serializers.Serializer):
     group_id = serializers.IntegerField()
-    message = serializers.CharField(max_length=30)
+    message = serializers.CharField(max_length=30, required=False)
 
 
 class JoinGroupRequestSerializer(serializers.ModelSerializer):