Function ok_or_none

fn ok_or_none<'de, T, D>(deserializer: D) -> Result<Option<T>, D::Error>
where
    T: Deserialize<'de>,
    D: Deserializer<'de>,

Use a default value if serialization fails for a field.

References

Inspired by:

[Solved] Serde deserialization on_error use default values? - help - The Rust Programming Language Forum