fix: return empty for empty tag request

bangumi · Nov 25, 2024 · 992ff96 · 992ff96
1 parent a5d5e62
commit 992ff96
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/internal/tag/cache_repo.go b/internal/tag/cache_repo.go
@@ -74,14 +74,18 @@ func (r cacheRepo) Get(ctx context.Context, id model.SubjectID) ([]Tag, error) {
 
 func (r cacheRepo) GetByIDs(ctx context.Context, ids []model.SubjectID) (map[model.SubjectID][]Tag, error) {
 	var tags []cachedTags
+	result := make(map[model.SubjectID][]Tag, len(ids))
+	if len(ids) == 0 {
+		return result, nil
+	}
+
 	err := r.cache.MGet(ctx, lo.Map(ids, func(item model.SubjectID, index int) string {
 		return cachekey.SubjectMetaTag(item)
 	}), &tags)
 	if err != nil {
 		return nil, errgo.Wrap(err, "cache.MGet")
 	}
 
-	result := make(map[model.SubjectID][]Tag, len(ids))
 	for _, tag := range tags {
 		result[tag.ID] = tag.Tags
 	}