Serializing `Null` as `None`?

[t-botz]

I have a field my_field: Option<Enum> and my yaml is like my_field: NULL.

Parsing it raise an error : "unknown variant NULL, expected one of [...]

Looking at the code I see that Null is serialized at unit which makes me wonder :

• Why would anyone Serialize/Deserialize the unit type?
• Shouldn't Null in yaml be None in Rust and vice versa?

(Working on a PR)

[t-botz]

Actually serde_yaml only support the ~ and null for Null values, hence why NULL is not recognized. It should be either:

• only null according to the yaml json schema
• null | Null | NULL | ~ according to the yaml core schema