Allow use of filter with ids in external search

src/lib.js

@@ -12,12 +12,9 @@ export function search(items, input, configuration, fulltext, facets) {
   const page = parseInt(input.page || 1);
   const is_all_filtered_items = input.is_all_filtered_items || false;
 
-  if (
-    configuration.native_search_enabled === false &&
-    (input.query || input.filter)
-  ) {
+  if (configuration.native_search_enabled === false && input.query) {
     throw new Error(
-      '"query" and "filter" options are not working once native search is disabled',
+      'The "query" option is not working once native search is disabled'
     );
   }
 
@@ -34,6 +31,13 @@ export function search(items, input, configuration, fulltext, facets) {
     _ids = input._ids;
   } else if (input.ids) {
     _ids = facets.internal_ids_from_ids_map(input.ids);
+
+    if (input.filter) {
+      _ids = items
+        .filter((v) => _ids.includes(v._id))
+        .filter(input.filter)
+        .map((v) => v._id);
+    }
     //console.log(_ids);
     query_ids = new FastBitSet(_ids);
   } else if (fulltext && (input.query || input.filter)) {

tests/searchSpec.js

@@ -263,7 +263,7 @@ describe('search', function () {
     } catch (err) {
       assert.equal(
         err.message,
-        '"query" and "filter" options are not working once native search is disabled'
+        'The "query" option is not working once native search is disabled'
       );
     }
 
@@ -362,6 +362,37 @@ describe('custom fulltext integration', function () {
     assert.equal(result.data.items.length, 2);
     done();
   });
+  it('makes faceted search after separated quasi fulltext with ids and filter', function test(done) {
+    let i = 10;
+    const temp_movies = movies.map((v) => {
+      v.id = i;
+      i += 10;
+      return v;
+    });
+
+    itemsjs = itemsJS(temp_movies, configuration);
+
+    let result = itemsjs.search({
+      ids: [50, 20, 10],
+      filter: function (v) {
+        return v.id === 10;
+      },
+    });
+
+    assert.equal(result.data.items[0].id, 10);
+    assert.equal(result.data.items[0]._id, 1);
+    assert.equal(result.data.items.length, 1);
+
+    result = itemsjs.search({
+      ids: [50, 20],
+      filter: function (v) {
+        return v.id === 10;
+      },
+    });
+
+    assert.equal(result.data.items.length, 0);
+    done();
+  });
 
   it('makes faceted search after separated quasi fulltext with custom id field', function test(done) {
     let i = 10;