用于验证null项的架构

Question

我是yml的新手。

我的yml数据文件可能包含也可能不包含"；引用："；标签。基本上，它可以是空的，所以为了成功验证，我把它做成了'required: no'

type: map
mapping:
file:
type: seq
sequence:
- type: map
mapping:
project:
type: str
required: yes
sub:
type: str
required: yes
source:
type: str
required: yes
reference:
type: seq
required: no
sequence:
- type: map
mapping:
name:
type: str
required: no
unique: yes

当我尝试使用Kwalify.pm验证yml时，它失败了，并出现问题：-

warning: Use of uninitialized value $data in concatenation (.) or string at /home/nv/utils/MFT/perl/lib/Kwalify-1.22/lib/Kwalify.pm

需要yml专家的帮助。谢谢

Answer 1

sequence:独立放置，不跟随更多缩进的内容，生成一个以sequence为键、以空标量为值的键值对。空标量将被处理为空字符串或null，这两者都不是架构所需的序列。

要获得空映射，请编写sequence: []。