Refactor errors

crates/pile-value/src/extract/item/epub/mod.rs

@@ -34,7 +34,13 @@ impl ObjectExtractor for EpubExtractor {
 		args: Option<&str>,
 	) -> Result<Option<PileValue>, std::io::Error> {
 		match (name.as_str(), args) {
-			("text", args) => self.text.field(name, args).await,
+			("text", args) => Ok(Some(
+				self.text
+					.field(name, args)
+					.await
+					.map(|x| x.unwrap_or(PileValue::Null))?,
+			)),
+
 			("meta", None) => Ok(Some(PileValue::ObjectExtractor(self.meta.clone()))),
 			_ => Ok(None),
 		}