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[中文 ](https://github.com/go-xorm/xorm/blob/master/README_CN.md )
Xorm is a simple and powerful ORM for Go.
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# Features
* Struct < - > Table Mapping Support
* Chainable APIs
* Transaction Support
* Both ORM and raw SQL operation Support
* Sync database schema Support
* Query Cache speed up
* Database Reverse support, See [Xorm Tool README ](https://github.com/go-xorm/cmd/blob/master/README.md )
* Simple cascade loading support
* Optimistic Locking support
* SQL Builder support via [github.com/go-xorm/builder ](https://github.com/go-xorm/builder )
# Drivers Support
Drivers for Go's sql package which currently support database/sql includes:
* Mysql: [github.com/go-sql-driver/mysql ](https://github.com/go-sql-driver/mysql )
* MyMysql: [github.com/ziutek/mymysql/godrv ](https://github.com/ziutek/mymysql/godrv )
* Postgres: [github.com/lib/pq ](https://github.com/lib/pq )
* Tidb: [github.com/pingcap/tidb ](https://github.com/pingcap/tidb )
* SQLite: [github.com/mattn/go-sqlite3 ](https://github.com/mattn/go-sqlite3 )
* MsSql: [github.com/denisenkom/go-mssqldb ](https://github.com/denisenkom/go-mssqldb )
* Oracle: [github.com/mattn/go-oci8 ](https://github.com/mattn/go-oci8 ) (experiment)
# Changelog
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* **v0.6.3**
* merge tests to main project
* add `Exist` function
* add `SumInt` function
* Mysql now support read and create column comment.
* fix time related bugs.
* fix some other bugs.
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* **v0.6.2**
* refactor tag parse methods
* add Scan features to Get
* add QueryString method
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* **v0.6.0**
* remove support for ql
* add query condition builder support via [github.com/go-xorm/builder ](https://github.com/go-xorm/builder ), so `Where` , `And` , `Or`
methods can use `builder.Cond` as parameter
* add Sum, SumInt, SumInt64 and NotIn methods
* some bugs fixed
[More changes ... ](https://github.com/go-xorm/manual-en-US/tree/master/chapter-16 )
# Installation
go get github.com/go-xorm/xorm
# Documents
* [Manual ](http://xorm.io/docs )
* [GoDoc ](http://godoc.org/github.com/go-xorm/xorm )
* [GoWalker ](http://gowalker.org/github.com/go-xorm/xorm )
# Quick Start
* Create Engine
```Go
engine, err := xorm.NewEngine(driverName, dataSourceName)
```
* Define a struct and Sync2 table struct to database
```Go
type User struct {
Id int64
Name string
Salt string
Age int
Passwd string `xorm:"varchar(200)"`
Created time.Time `xorm:"created"`
Updated time.Time `xorm:"updated"`
}
err := engine.Sync2(new(User))
```
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* `Query` runs a SQL string, the returned results is `[]map[string][]byte` , `QueryString` returns `[]map[string]string` .
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```Go
results, err := engine.Query("select * from user")
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results, err := engine.QueryString("select * from user")
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```
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* `Execute` runs a SQL string, it returns `affected` and `error`
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```Go
affected, err := engine.Exec("update user set age = ? where name = ?", age, name)
```
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* `Insert` one or multiple records to database
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```Go
affected, err := engine.Insert(& user)
// INSERT INTO struct () values ()
affected, err := engine.Insert(& user1, & user2)
// INSERT INTO struct1 () values ()
// INSERT INTO struct2 () values ()
affected, err := engine.Insert(& users)
// INSERT INTO struct () values (),(),()
affected, err := engine.Insert(& user1, & users)
// INSERT INTO struct1 () values ()
// INSERT INTO struct2 () values (),(),()
```
* Query one record from database
```Go
has, err := engine.Get(& user)
// SELECT * FROM user LIMIT 1
has, err := engine.Where("name = ?", name).Desc("id").Get(& user)
// SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
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var name string
has, err := engine.Where("id = ?", id).Cols("name").Get(& name)
// SELECT name FROM user WHERE id = ?
var id int64
has, err := engine.Where("name = ?", name).Cols("id").Get(& id)
// SELECT id FROM user WHERE name = ?
var valuesMap = make(map[string]string)
has, err := engine.Where("id = ?", id).Get(& valuesMap)
// SELECT * FROM user WHERE id = ?
var valuesSlice = make([]interface{}, len(cols))
has, err := engine.Where("id = ?", id).Cols(cols...).Get(& valuesSlice)
// SELECT col1, col2, col3 FROM user WHERE id = ?
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```
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* Check if one record exist on table
```Go
has, err := testEngine.Exist(new(RecordExist))
// SELECT * FROM record_exist LIMIT 1
has, err = testEngine.Exist(& RecordExist{
Name: "test1",
})
// SELECT * FROM record_exist WHERE name = ? LIMIT 1
has, err = testEngine.Where("name = ?", "test1").Exist(& RecordExist{})
// SELECT * FROM record_exist WHERE name = ? LIMIT 1
has, err = testEngine.SQL("select * from record_exist where name = ?", "test1").Exist()
// select * from record_exist where name = ?
has, err = testEngine.Table("record_exist").Exist()
// SELECT * FROM record_exist LIMIT 1
has, err = testEngine.Table("record_exist").Where("name = ?", "test1").Exist()
// SELECT * FROM record_exist WHERE name = ? LIMIT 1
```
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* Query multiple records from database, also you can use join and extends
```Go
var users []User
err := engine.Where("name = ?", name).And("age > 10").Limit(10, 0).Find(& users)
// SELECT * FROM user WHERE name = ? AND age > 10 limit 0 offset 10
type Detail struct {
Id int64
UserId int64 `xorm:"index"`
}
type UserDetail struct {
User `xorm:"extends"`
Detail `xorm:"extends"`
}
var users []UserDetail
err := engine.Table("user").Select("user.*, detail.*")
Join("INNER", "detail", "detail.user_id = user.id").
Where("user.name = ?", name).Limit(10, 0).
Find(& users)
// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 0 offset 10
```
* Query multiple records and record by record handle, there are two methods Iterate and Rows
```Go
err := engine.Iterate(& User{Name:name}, func(idx int, bean interface{}) error {
user := bean.(*User)
return nil
})
// SELECT * FROM user
rows, err := engine.Rows(& User{Name:name})
// SELECT * FROM user
defer rows.Close()
bean := new(Struct)
for rows.Next() {
err = rows.Scan(bean)
}
```
* Update one or more records, default will update non-empty and non-zero fields except when you use Cols, AllCols and so on.
```Go
affected, err := engine.Id(1).Update(& user)
// UPDATE user SET ... Where id = ?
affected, err := engine.Update(& user, & User{Name:name})
// UPDATE user SET ... Where name = ?
var ids = []int64{1, 2, 3}
affected, err := engine.In("id", ids).Update(& user)
// UPDATE user SET ... Where id IN (?, ?, ?)
// force update indicated columns by Cols
affected, err := engine.Id(1).Cols("age").Update(& User{Name:name, Age: 12})
// UPDATE user SET age = ?, updated=? Where id = ?
// force NOT update indicated columns by Omit
affected, err := engine.Id(1).Omit("name").Update(& User{Name:name, Age: 12})
// UPDATE user SET age = ?, updated=? Where id = ?
affected, err := engine.Id(1).AllCols().Update(& user)
// UPDATE user SET name=?,age=?,salt=?,passwd=?,updated=? Where id = ?
```
* Delete one or more records, Delete MUST have condition
```Go
affected, err := engine.Where(...).Delete(& user)
// DELETE FROM user Where ...
affected, err := engine.Id(2).Delete(& user)
```
* Count records
```Go
counts, err := engine.Count(& user)
// SELECT count(*) AS total FROM user
```
* Query conditions builder
```Go
err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))).Find(& users)
// SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
```
# Cases
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* [studygolang ](http://studygolang.com/ ) - [github.com/studygolang/studygolang ](https://github.com/studygolang/studygolang )
* [Gitea ](http://gitea.io ) - [github.com/go-gitea/gitea ](http://github.com/go-gitea/gitea )
* [Gogs ](http://try.gogits.org ) - [github.com/gogits/gogs ](http://github.com/gogits/gogs )
* [grafana ](https://grafana.com/ ) - [github.com/grafana/grafana ](http://github.com/grafana/grafana )
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* [github.com/m3ng9i/qreader ](https://github.com/m3ng9i/qreader )
* [Wego ](http://github.com/go-tango/wego )
* [Docker.cn ](https://docker.cn/ )
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* [Xorm Adapter ](https://github.com/casbin/xorm-adapter ) for [Casbin ](https://github.com/casbin/casbin ) - [github.com/casbin/xorm-adapter ](https://github.com/casbin/xorm-adapter )
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* [Gorevel ](http://gorevel.cn/ ) - [github.com/goofcc/gorevel ](http://github.com/goofcc/gorevel )
* [Gowalker ](http://gowalker.org ) - [github.com/Unknwon/gowalker ](http://github.com/Unknwon/gowalker )
* [Gobuild.io ](http://gobuild.io ) - [github.com/shxsun/gobuild ](http://github.com/shxsun/gobuild )
* [Sudo China ](http://sudochina.com ) - [github.com/insionng/toropress ](http://github.com/insionng/toropress )
* [Godaily ](http://godaily.org ) - [github.com/govc/godaily ](http://github.com/govc/godaily )
* [YouGam ](http://www.yougam.com/ )
* [GoCMS - github.com/zzboy/GoCMS ](https://github.com/zzdboy/GoCMS )
* [GoBBS - gobbs.domolo.com ](http://gobbs.domolo.com/ )
* [go-blog ](http://wangcheng.me ) - [github.com/easykoo/go-blog ](https://github.com/easykoo/go-blog )
# Discuss
Please visit [Xorm on Google Groups ](https://groups.google.com/forum/#!forum/xorm )
# Contributing
If you want to pull request, please see [CONTRIBUTING ](https://github.com/go-xorm/xorm/blob/master/CONTRIBUTING.md )
# LICENSE
BSD License
[http://creativecommons.org/licenses/BSD/ ](http://creativecommons.org/licenses/BSD/ )