field<T> method
Reads part name as text, coerced to T.
Implementation
Result<T, Rejection> field<T>(String name) {
final part = parts[name];
if (part == null) {
if (null is T) return Ok(null as T);
return Err(Rejection.badRequest('multipart part "$name" is required'));
}
return coerce<T>(part.asText, source: 'multipart part "$name"');
}