Added rollback cmd

pkg/migration/migration.go

@@ -62,6 +62,7 @@ func Migrate(x *xorm.Engine) {
 	if err != nil {
 		log.Log.Fatalf("Migration failed: %v", err)
 	}
+	log.Log.Info("Ran all migrations successfully.")
 }
 
 func ListMigrations() {
@@ -78,7 +79,6 @@ func ListMigrations() {
 	table := tablewriter.NewWriter(os.Stdout)
 	table.SetHeader([]string{"ID", "Description"})
 	table.SetAlignment(tablewriter.ALIGN_LEFT)
-
 	table.SetHeaderColor(tablewriter.Colors{tablewriter.Bold, tablewriter.BgGreenColor},
 		tablewriter.Colors{tablewriter.Bold, tablewriter.BgGreenColor})
 
@@ -88,8 +88,13 @@ func ListMigrations() {
 	table.Render()
 }
 
-func Rollback(until string) {
-
+func Rollback(migrationID string) {
+	m := initMigration(nil)
+	err := m.RollbackTo(migrationID)
+	if err != nil {
+		log.Log.Fatalf("Could not rollback: %v", err)
+	}
+	log.Log.Info("Rolled back successfully.")
 }
 
 // Deletes a column from a table. All arguments are strings, to let them be standalone and not depending on any struct.