Added migration

pkg/migration/20190324205606.go

@@ -21,6 +21,15 @@ import (
 	"src.techknowlogick.com/xormigrate"
 )
 
+// Used for rollback
+type tasksReminderDate struct {
+	ReminderUnix int64 `xorm:"int(11) INDEX"`
+}
+
+func (tasksReminderDate) TableName() string {
+	return "tasks"
+}
+
 func init() {
 	migrations = append(migrations, &xormigrate.Migration{
 		ID:          "20190324205606",
@@ -29,8 +38,7 @@ func init() {
 			return dropTableColum(tx, "tasks", "reminder_unix")
 		},
 		Rollback: func(tx *xorm.Engine) error {
-
-			return nil
+			return tx.Sync2(tasksReminderDate{})
 		},
 	})
 }