pub fn deserialize_optional_decimal_str<'de, D>(
deserializer: D,
) -> Result<Option<Decimal>, D::Error>where
D: Deserializer<'de>,Expand description
Deserializes an optional Decimal from a string field.
Returns None if the string is empty or “0”, otherwise parses to Decimal.
This is a strict string-only deserializer; for flexible handling of strings,
numbers, and null, use deserialize_optional_decimal.
§Errors
Returns an error if the string cannot be parsed as a valid decimal.