search result hits now have a field with the name of the index

this allows you to figure out where a result actually came
from when using aliases

index_impl.go

@@ -497,6 +497,12 @@ func (i *indexImpl) Search(req *SearchRequest) (sr *SearchResult, err error) {
 		}
 	}
 
+	for _, hit := range hits {
+		if i.name != "" {
+			hit.Index = i.name
+		}
+	}
+
 	atomic.AddUint64(&i.stats.searches, 1)
 	searchDuration := time.Since(searchStart)
 	atomic.AddUint64(&i.stats.searchTime, uint64(searchDuration))

search/search.go

@@ -51,6 +51,7 @@ type FieldTermLocationMap map[string]TermLocationMap
 type FieldFragmentMap map[string][]string
 
 type DocumentMatch struct {
+	Index     string               `json:"index,omitempty"`
 	ID        string               `json:"id"`
 	Score     float64              `json:"score"`
 	Expl      *Explanation         `json:"explanation,omitempty"`