Tweak status codes

crates/pile-dataset/src/serve/extract.rs

@@ -101,17 +101,24 @@ pub async fn get_extract(
 	let mut value = None;
 	for path in &paths {
 		match item.query(&extract_state, path).await {
-			Ok(Some(PileValue::Null)) | Ok(None) => continue,
+			Ok(None) => continue,
+
+			Ok(Some(PileValue::Null)) => {
+				value = Some(PileValue::Null);
+				continue;
+			}
+
 			Ok(Some(v)) => {
 				value = Some(v);
 				break;
 			}
+
 			Err(e) => return (StatusCode::INTERNAL_SERVER_ERROR, format!("{e:?}")).into_response(),
 		}
 	}
 
 	let Some(value) = value else {
-		return StatusCode::NOT_FOUND.into_response();
+		return (StatusCode::BAD_REQUEST, "no value").into_response();
 	};
 
 	debug!(
@@ -177,6 +184,7 @@ pub async fn get_extract(
 				Json(json),
 			)
 				.into_response(),
+
 			Err(e) => (StatusCode::INTERNAL_SERVER_ERROR, format!("{e:?}")).into_response(),
 		},
 	}

crates/pile-dataset/src/serve/schema_field.rs

@@ -84,17 +84,24 @@ pub async fn schema_field(
 	let mut value = None;
 	for path in paths {
 		match item.query(&extract_state, path).await {
-			Ok(Some(PileValue::Null)) | Ok(None) => continue,
+			Ok(None) => continue,
+
+			Ok(Some(PileValue::Null)) => {
+				value = Some(PileValue::Null);
+				continue;
+			}
+
 			Ok(Some(v)) => {
 				value = Some(v);
 				break;
 			}
+
 			Err(e) => return (StatusCode::INTERNAL_SERVER_ERROR, format!("{e:?}")).into_response(),
 		}
 	}
 
 	let Some(value) = value else {
-		return StatusCode::NOT_FOUND.into_response();
+		return (StatusCode::BAD_REQUEST, "no value").into_response();
 	};
 
 	debug!(