From ef8e6750a0b792937377fe97dcb56d737d90a039 Mon Sep 17 00:00:00 2001
From: ZhengYang <zhengyang4k@gmail.com>
Date: Thu, 14 Aug 2014 13:10:42 +0800
Subject: [PATCH] halt when there is nothing to rollback

---
 migrate.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/migrate.go b/migrate.go
index c65fae7..afe4257 100644
--- a/migrate.go
+++ b/migrate.go
@@ -152,6 +152,10 @@ func migrate(goal, crupath, driver, connStr string) {
 	defer db.Close()
 	checkForSchemaUpdateTable(db)
 	latestName, latestTime := getLatestMigration(db)
+	if goal == "rollback" && latestName == "" {
+		ColorLog("[ERRO] There is nothing to rollback\n")
+		os.Exit(2)
+	}
 	writeMigrationSourceFile(dir, source, driver, connStr, latestTime, latestName, goal)
 	buildMigrationBinary(dir, binary)
 	runMigrationBinary(dir, binary)