query: Return empty array instead of nil from API

Signed-off-by: Prem Kumar <prmsrswt@gmail.com>
thanos-io · Jun 14, 2020 · 294823d · 294823d
1 parent deda923
commit 294823d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pkg/query/api/v1.go b/pkg/query/api/v1.go
@@ -485,6 +485,10 @@ func (api *API) labelValues(r *http.Request) (interface{}, []error, *ApiError) {
 		return nil, nil, &ApiError{errorExec, err}
 	}
 
+	if vals == nil {
+		vals = make([]string, 0)
+	}
+
 	return vals, warnings, nil
 }