Fix 89878 (elastic#94793) (elastic#94833)

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

src/plugins/data/common/es_query/es_query/filter_matches_index.test.ts

@@ -31,6 +31,20 @@ describe('filterMatchesIndex', () => {
     expect(filterMatchesIndex(filter, indexPattern)).toBe(true);
   });
 
+  it('should return true if custom filter for the same index is passed', () => {
+    const filter = { meta: { index: 'foo', key: 'bar', type: 'custom' } } as Filter;
+    const indexPattern = { id: 'foo', fields: [{ name: 'bara' }] } as IIndexPattern;
+
+    expect(filterMatchesIndex(filter, indexPattern)).toBe(true);
+  });
+
+  it('should return false if custom filter for a different index is passed', () => {
+    const filter = { meta: { index: 'foo', key: 'bar', type: 'custom' } } as Filter;
+    const indexPattern = { id: 'food', fields: [{ name: 'bara' }] } as IIndexPattern;
+
+    expect(filterMatchesIndex(filter, indexPattern)).toBe(false);
+  });
+
   it('should return false if the filter key does not match a field name', () => {
     const filter = { meta: { index: 'foo', key: 'baz' } } as Filter;
     const indexPattern = { id: 'foo', fields: [{ name: 'bar' }] } as IIndexPattern;

src/plugins/data/common/es_query/es_query/filter_matches_index.ts

@@ -18,5 +18,12 @@ export function filterMatchesIndex(filter: Filter, indexPattern?: IIndexPattern
   if (!filter.meta?.key || !indexPattern) {
     return true;
   }
+
+  // Fixes https://github.com/elastic/kibana/issues/89878
+  // Custom filters may refer multiple fields. Validate the index id only.
+  if (filter.meta?.type === 'custom') {
+    return filter.meta.index === indexPattern.id;
+  }
+
   return indexPattern.fields.some((field: IFieldType) => field.name === filter.meta.key);
 }