vis(vega): fix data url with signal not working (#10339) (#10559)

* vis(vega): fix data url with signal not working



* Changeset file for PR #10339 created/updated

---------



(cherry picked from commit ba02fa5)

Signed-off-by: Yulong Ruan <[email protected]>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: opensearch-changeset-bot[bot] <154024398+opensearch-changeset-bot[bot]@users.noreply.github.com>

Author: 3 people

changelogs/fragments/10339.yml

@@ -0,0 +1,2 @@
+fix:
+- Fix vega data url with signal not working ([#10339](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/10339))

src/plugins/vis_type_vega/public/data_model/vega_parser.ts

@@ -715,8 +715,8 @@ The URL is an identifier only. OpenSearch Dashboards and your browser will never
         this._findObjectDataUrls(elem, onFind, key);
       }
     } else if (_.isPlainObject(obj)) {
-      if (key === 'data' && _.isPlainObject(obj.url)) {
-        // Assume that any  "data": {"url": {...}}  is a request for data
+      if (key === 'data' && _.isPlainObject(obj.url) && _.isEmpty(obj.url.signal)) {
+        // Assume that any  "data": {"url": {...}} without "signal" is a request for data
         if (obj.values !== undefined || obj.source !== undefined) {
           throw new Error(
             i18n.translate(