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// Copyright 2012 James Cooper. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// Package gorp provides a simple way to marshal Go structs to and from
// SQL databases. It uses the database/sql package, and should work with any
// compliant database/sql driver.
//
// Source code and project home:
// https://github.com/go-gorp/gorp
package gorp
import (
"database/sql"
"time"
)
// Transaction represents a database transaction.
// Insert/Update/Delete/Get/Exec operations will be run in the context
// of that transaction. Transactions should be terminated with
// a call to Commit() or Rollback()
type Transaction struct {
dbmap *DbMap
tx *sql.Tx
closed bool
}
// Insert has the same behavior as DbMap.Insert(), but runs in a transaction.
func (t *Transaction) Insert(list ...interface{}) error {
return insert(t.dbmap, t, list...)
}
// Update had the same behavior as DbMap.Update(), but runs in a transaction.
func (t *Transaction) Update(list ...interface{}) (int64, error) {
return update(t.dbmap, t, nil, list...)
}
// UpdateColumns had the same behavior as DbMap.UpdateColumns(), but runs in a transaction.
func (t *Transaction) UpdateColumns(filter ColumnFilter, list ...interface{}) (int64, error) {
return update(t.dbmap, t, filter, list...)
}
// Delete has the same behavior as DbMap.Delete(), but runs in a transaction.
func (t *Transaction) Delete(list ...interface{}) (int64, error) {
return delete(t.dbmap, t, list...)
}
// Get has the same behavior as DbMap.Get(), but runs in a transaction.
func (t *Transaction) Get(i interface{}, keys ...interface{}) (interface{}, error) {
return get(t.dbmap, t, i, keys...)
}
// Select has the same behavior as DbMap.Select(), but runs in a transaction.
func (t *Transaction) Select(i interface{}, query string, args ...interface{}) ([]interface{}, error) {
return hookedselect(t.dbmap, t, i, query, args...)
}
// Exec has the same behavior as DbMap.Exec(), but runs in a transaction.
func (t *Transaction) Exec(query string, args ...interface{}) (sql.Result, error) {
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, args...)
}
return exec(t, query, args...)
}
// SelectInt is a convenience wrapper around the gorp.SelectInt function.
func (t *Transaction) SelectInt(query string, args ...interface{}) (int64, error) {
return SelectInt(t, query, args...)
}
// SelectNullInt is a convenience wrapper around the gorp.SelectNullInt function.
func (t *Transaction) SelectNullInt(query string, args ...interface{}) (sql.NullInt64, error) {
return SelectNullInt(t, query, args...)
}
// SelectFloat is a convenience wrapper around the gorp.SelectFloat function.
func (t *Transaction) SelectFloat(query string, args ...interface{}) (float64, error) {
return SelectFloat(t, query, args...)
}
// SelectNullFloat is a convenience wrapper around the gorp.SelectNullFloat function.
func (t *Transaction) SelectNullFloat(query string, args ...interface{}) (sql.NullFloat64, error) {
return SelectNullFloat(t, query, args...)
}
// SelectStr is a convenience wrapper around the gorp.SelectStr function.
func (t *Transaction) SelectStr(query string, args ...interface{}) (string, error) {
return SelectStr(t, query, args...)
}
// SelectNullStr is a convenience wrapper around the gorp.SelectNullStr function.
func (t *Transaction) SelectNullStr(query string, args ...interface{}) (sql.NullString, error) {
return SelectNullStr(t, query, args...)
}
// SelectOne is a convenience wrapper around the gorp.SelectOne function.
func (t *Transaction) SelectOne(holder interface{}, query string, args ...interface{}) error {
return SelectOne(t.dbmap, t, holder, query, args...)
}
// Commit commits the underlying database transaction.
func (t *Transaction) Commit() error {
if !t.closed {
t.closed = true
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, "commit;")
}
return t.tx.Commit()
}
return sql.ErrTxDone
}
// Rollback rolls back the underlying database transaction.
func (t *Transaction) Rollback() error {
if !t.closed {
t.closed = true
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, "rollback;")
}
return t.tx.Rollback()
}
return sql.ErrTxDone
}
// Savepoint creates a savepoint with the given name. The name is interpolated
// directly into the SQL SAVEPOINT statement, so you must sanitize it if it is
// derived from user input.
func (t *Transaction) Savepoint(name string) error {
query := "savepoint " + t.dbmap.Dialect.QuoteField(name)
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, nil)
}
_, err := t.tx.Exec(query)
return err
}
// RollbackToSavepoint rolls back to the savepoint with the given name. The
// name is interpolated directly into the SQL SAVEPOINT statement, so you must
// sanitize it if it is derived from user input.
func (t *Transaction) RollbackToSavepoint(savepoint string) error {
query := "rollback to savepoint " + t.dbmap.Dialect.QuoteField(savepoint)
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, nil)
}
_, err := t.tx.Exec(query)
return err
}
// ReleaseSavepint releases the savepoint with the given name. The name is
// interpolated directly into the SQL SAVEPOINT statement, so you must sanitize
// it if it is derived from user input.
func (t *Transaction) ReleaseSavepoint(savepoint string) error {
query := "release savepoint " + t.dbmap.Dialect.QuoteField(savepoint)
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, nil)
}
_, err := t.tx.Exec(query)
return err
}
// Prepare has the same behavior as DbMap.Prepare(), but runs in a transaction.
func (t *Transaction) Prepare(query string) (*sql.Stmt, error) {
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, nil)
}
return t.tx.Prepare(query)
}
func (t *Transaction) queryRow(query string, args ...interface{}) *sql.Row {
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, args...)
}
return t.tx.QueryRow(query, args...)
}
func (t *Transaction) query(query string, args ...interface{}) (*sql.Rows, error) {
if t.dbmap.logger != nil {
now := time.Now()
defer t.dbmap.trace(now, query, args...)
}
return t.tx.Query(query, args...)
}
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