Ensure we're using the data view time field for the sort param too

x-pack/plugins/stack_alerts/server/rule_types/es_query/lib/fetch_search_source_query.ts

@@ -112,18 +112,17 @@ export function updateSearchSource(
  alertLimit?: number
 ): { searchSource: ISearchSource; filterToExcludeHitsFromPreviousRun: Filter | null } {
  const isGroupAgg = isGroupAggregation(params.termField);
- const timeFieldName = params.timeField || index.timeFieldName;
+ const timeField = index.getTimeField();
 
- if (!timeFieldName) {
- throw new Error('Invalid data view without timeFieldName.');
+ if (!timeField) {
+ throw new Error(`Data view with ID ${index.id} no longer contains a time field.`);
  }
 
  searchSource.setField('size', isGroupAgg ? 0 : params.size);
 
- const field = index.getTimeField();
  const filters = [
  buildRangeFilter(
- field!,
+ timeField,
  { lte: dateEnd, gte: dateStart, format: 'strict_date_optional_time' },
  index
  ),
@@ -135,7 +134,7 @@ export function updateSearchSource(
  // add additional filter for documents with a timestamp greater than
  // the timestamp of the previous run, so that those documents are not counted twice
  filterToExcludeHitsFromPreviousRun = buildRangeFilter(
- field!,
+ timeField,
  { gt: latestTimestamp, format: 'strict_date_optional_time' },
  index
  );
@@ -150,7 +149,7 @@ export function updateSearchSource(
  searchSourceChild.setField('filter', filters as Filter[]);
  searchSourceChild.setField('sort', [
  {
- [timeFieldName]: {
+ [timeField.name]: {
  order: SortDirection.desc,
  format: 'strict_date_optional_time||epoch_millis',
  },