DropIndex 추가

mongo.go

@@ -124,6 +124,18 @@ func (mc MongoClient) Close() {
 	}
 }
 
+func (mc MongoClient) DropIndex(coll CollectionName, name string) error {
+	matchcoll := mc.Collection(coll)
+	_, err := matchcoll.Indexes().DropOne(context.Background(), name)
+	if commanderr, ok := err.(mongo.CommandError); ok {
+		if commanderr.Code == 27 {
+			// 인덱스가 없는 것이므로 그냥 성공
+			return nil
+		}
+	}
+	return err
+}
+
 func (mc MongoClient) Watch(coll CollectionName, pipeline mongo.Pipeline, opts ...*options.ChangeStreamOptions) (*mongo.ChangeStream, error) {
 	if len(opts) == 0 {
 		opts = []*options.ChangeStreamOptions{options.ChangeStream().SetFullDocument(options.UpdateLookup).SetMaxAwaitTime(0)}