INNER CODE UNIT · Rust

parse_field

jhspetersson/fselect · src/field/mod.rs:61

            pub fn parse_field(s: &str) -> Result<(Self, Option<String>), String> {
                let field = s.to_ascii_lowercase();

                if field.contains('.') {
                    let parts: Vec<&str> = field.split('.').collect();

                    if parts.len() != 2 {
                        return Err(String::from("Invalid field format, expected 'root_alias.field'"));
                    }

                    let root_alias = parts[0];
                    let field_name = parts[1];

                    return match Self::parse_field(field_name) {
                        Ok((field, _)) => Ok((field, Some(root_alias.to_string()))),
                        Err(err) => Err(err),
                    }
                }

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