diff --git a/CHANGELOG.md b/CHANGELOG.md
index ae7e6b8c3..e8e63964b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- 修复匿名签名资源下载缺少 repository 查询方法导致的后端生产构建失败。
+
 ## v1.0.37
 
 - 管理后台模型能力与请求协议改为品牌卡片单选，提升配置辨识度与操作一致性。
diff --git a/backend/internal/repository/repository.go b/backend/internal/repository/repository.go
index 00fdcdd49..4b8a4ddca 100644
--- a/backend/internal/repository/repository.go
+++ b/backend/internal/repository/repository.go
@@ -678,6 +678,14 @@ func (r *Repository) SaveResource(resource *model.Resource) error {
 	return r.db.Save(resource).Error
 }
 
+func (r *Repository) Resource(id string) (*model.Resource, error) {
+	var resource model.Resource
+	if err := r.db.First(&resource, "id = ?", id).Error; err != nil {
+		return nil, err
+	}
+	return &resource, nil
+}
+
 func (r *Repository) ResourceForUser(userID string, id string) (*model.Resource, error) {
 	var resource model.Resource
 	if err := r.db.First(&resource, "id = ? AND user_id = ?", id, userID).Error; err != nil {