DB Migrations (#67)

vendor/github.com/go-xorm/xorm/transaction.go

@@ -0,0 +1,26 @@
+// Copyright 2018 The Xorm Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package xorm
+
+// Transaction Execute sql wrapped in a transaction(abbr as tx), tx will automatic commit if no errors occurred
+func (engine *Engine) Transaction(f func(*Session) (interface{}, error)) (interface{}, error) {
+	session := engine.NewSession()
+	defer session.Close()
+
+	if err := session.Begin(); err != nil {
+		return nil, err
+	}
+
+	result, err := f(session)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := session.Commit(); err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}