Improve search relevance and artist transliteration

services/api/internal/search/service.go

@@ -43,6 +43,7 @@ type limits struct{ artists, albums, tracks, offset int }
 
 type found struct {
 	artists, albums, tracks []string
+	exactArtists            []string
 	totals                  [3]int
 }
 
@@ -50,7 +51,11 @@ func (h *Handler) query(ctx context.Context, q string, l limits) (found, error)
 	var queries []MultiQuery
 	add := func(index string, n int) {
 		if n > 0 {
-			queries = append(queries, MultiQuery{IndexUID: index, Q: q, Limit: n, Offset: l.offset, AttributesToRetrieve: []string{"id"}})
+			attrs := []string{"id"}
+			if index == IndexArtists {
+				attrs = append(attrs, "name", "name_translit")
+			}
+			queries = append(queries, MultiQuery{IndexUID: index, Q: q, Limit: n, Offset: l.offset, MatchingStrategy: "all", AttributesToRetrieve: attrs})
 		}
 	}
 	add(IndexArtists, l.artists)
@@ -71,6 +76,7 @@ func (h *Handler) query(ctx context.Context, q string, l limits) (found, error)
 		switch k {
 		case 0:
 			f.artists = res[i].IDs
+			f.exactArtists = res[i].ExactIDs
 		case 1:
 			f.albums = res[i].IDs
 		case 2:
@@ -181,7 +187,7 @@ func (h *Handler) personal(ctx context.Context, f found, want limits) found {
 			h.log.WarnContext(ctx, "suggest personalization failed", "err", err)
 		}
 	}
-	f.artists = personalize(f.artists, aff, want.artists)
+	f.artists = personalizeArtists(f.artists, f.exactArtists, aff, want.artists)
 	f.albums = personalize(f.albums, aff, want.albums)
 	f.tracks = personalize(f.tracks, aff, want.tracks)
 	return f