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290 lines
7.8 KiB
Markdown
290 lines
7.8 KiB
Markdown
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[中文](https://github.com/go-xorm/xorm/blob/master/README_CN.md)
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Xorm is a simple and powerful ORM for Go.
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[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-xorm/xorm?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
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[![Build Status](https://drone.io/github.com/go-xorm/tests/status.png)](https://drone.io/github.com/go-xorm/tests/latest)
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# Notice
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The last master version is not backwards compatible. You should use `engine.ShowSQL()` and `engine.Logger().SetLevel()` instead of `engine.ShowSQL = `, `engine.ShowInfo = ` and so on.
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# Features
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* Struct <-> Table Mapping Support
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* Chainable APIs
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* Transaction Support
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* Both ORM and raw SQL operation Support
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* Sync database schema Support
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* Query Cache speed up
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* Database Reverse support, See [Xorm Tool README](https://github.com/go-xorm/cmd/blob/master/README.md)
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* Simple cascade loading support
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* Optimistic Locking support
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* SQL Builder support via [github.com/go-xorm/builder](https://github.com/go-xorm/builder)
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# Drivers Support
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Drivers for Go's sql package which currently support database/sql includes:
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* Mysql: [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
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* MyMysql: [github.com/ziutek/mymysql/godrv](https://github.com/ziutek/mymysql/godrv)
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* Postgres: [github.com/lib/pq](https://github.com/lib/pq)
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* Tidb: [github.com/pingcap/tidb](https://github.com/pingcap/tidb)
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* SQLite: [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
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* MsSql: [github.com/denisenkom/go-mssqldb](https://github.com/denisenkom/go-mssqldb)
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* MsSql: [github.com/lunny/godbc](https://github.com/lunny/godbc)
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* Oracle: [github.com/mattn/go-oci8](https://github.com/mattn/go-oci8) (experiment)
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# Changelog
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* **v0.6.0**
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* remove support for ql
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* add query condition builder support via [github.com/go-xorm/builder](https://github.com/go-xorm/builder), so `Where`, `And`, `Or`
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methods can use `builder.Cond` as parameter
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* add Sum, SumInt, SumInt64 and NotIn methods
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* some bugs fixed
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* **v0.5.0**
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* logging interface changed
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* some bugs fixed
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* **v0.4.5**
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* many bugs fixed
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* extends support unlimited deepth
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* Delete Limit support
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* **v0.4.4**
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* ql database expriment support
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* tidb database expriment support
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* sql.NullString and etc. field support
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* select ForUpdate support
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* many bugs fixed
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[More changes ...](https://github.com/go-xorm/manual-en-US/tree/master/chapter-16)
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# Installation
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If you have [gopm](https://github.com/gpmgo/gopm) installed,
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gopm get github.com/go-xorm/xorm
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Or
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go get github.com/go-xorm/xorm
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# Documents
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* [Manual](http://xorm.io/docs)
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* [GoDoc](http://godoc.org/github.com/go-xorm/xorm)
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* [GoWalker](http://gowalker.org/github.com/go-xorm/xorm)
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# Quick Start
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* Create Engine
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```Go
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engine, err := xorm.NewEngine(driverName, dataSourceName)
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```
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* Define a struct and Sync2 table struct to database
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```Go
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type User struct {
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Id int64
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Name string
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Salt string
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Age int
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Passwd string `xorm:"varchar(200)"`
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Created time.Time `xorm:"created"`
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Updated time.Time `xorm:"updated"`
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}
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err := engine.Sync2(new(User))
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```
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* Query a SQL string, the returned results is []map[string][]byte
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```Go
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results, err := engine.Query("select * from user")
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```
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* Execute a SQL string, the returned results
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```Go
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affected, err := engine.Exec("update user set age = ? where name = ?", age, name)
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```
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* Insert one or multiple records to database
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```Go
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affected, err := engine.Insert(&user)
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// INSERT INTO struct () values ()
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affected, err := engine.Insert(&user1, &user2)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values ()
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affected, err := engine.Insert(&users)
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// INSERT INTO struct () values (),(),()
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affected, err := engine.Insert(&user1, &users)
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// INSERT INTO struct1 () values ()
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// INSERT INTO struct2 () values (),(),()
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```
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* Query one record from database
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```Go
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has, err := engine.Get(&user)
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// SELECT * FROM user LIMIT 1
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has, err := engine.Where("name = ?", name).Desc("id").Get(&user)
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// SELECT * FROM user WHERE name = ? ORDER BY id DESC LIMIT 1
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```
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* Query multiple records from database, also you can use join and extends
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```Go
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var users []User
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err := engine.Where("name = ?", name).And("age > 10").Limit(10, 0).Find(&users)
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// SELECT * FROM user WHERE name = ? AND age > 10 limit 0 offset 10
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type Detail struct {
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Id int64
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UserId int64 `xorm:"index"`
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}
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type UserDetail struct {
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User `xorm:"extends"`
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Detail `xorm:"extends"`
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}
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var users []UserDetail
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err := engine.Table("user").Select("user.*, detail.*")
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Join("INNER", "detail", "detail.user_id = user.id").
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Where("user.name = ?", name).Limit(10, 0).
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Find(&users)
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// SELECT user.*, detail.* FROM user INNER JOIN detail WHERE user.name = ? limit 0 offset 10
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```
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* Query multiple records and record by record handle, there are two methods Iterate and Rows
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```Go
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err := engine.Iterate(&User{Name:name}, func(idx int, bean interface{}) error {
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user := bean.(*User)
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return nil
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})
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// SELECT * FROM user
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rows, err := engine.Rows(&User{Name:name})
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// SELECT * FROM user
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defer rows.Close()
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bean := new(Struct)
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for rows.Next() {
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err = rows.Scan(bean)
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}
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```
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* Update one or more records, default will update non-empty and non-zero fields except when you use Cols, AllCols and so on.
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```Go
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affected, err := engine.Id(1).Update(&user)
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// UPDATE user SET ... Where id = ?
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affected, err := engine.Update(&user, &User{Name:name})
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// UPDATE user SET ... Where name = ?
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var ids = []int64{1, 2, 3}
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affected, err := engine.In("id", ids).Update(&user)
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// UPDATE user SET ... Where id IN (?, ?, ?)
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// force update indicated columns by Cols
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affected, err := engine.Id(1).Cols("age").Update(&User{Name:name, Age: 12})
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// UPDATE user SET age = ?, updated=? Where id = ?
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// force NOT update indicated columns by Omit
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affected, err := engine.Id(1).Omit("name").Update(&User{Name:name, Age: 12})
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// UPDATE user SET age = ?, updated=? Where id = ?
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affected, err := engine.Id(1).AllCols().Update(&user)
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// UPDATE user SET name=?,age=?,salt=?,passwd=?,updated=? Where id = ?
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```
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* Delete one or more records, Delete MUST have condition
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```Go
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affected, err := engine.Where(...).Delete(&user)
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// DELETE FROM user Where ...
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affected, err := engine.Id(2).Delete(&user)
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```
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* Count records
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```Go
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counts, err := engine.Count(&user)
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// SELECT count(*) AS total FROM user
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```
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* Query conditions builder
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```Go
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err := engine.Where(builder.NotIn("a", 1, 2).And(builder.In("b", "c", "d", "e"))).Find(&users)
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// SELECT id, name ... FROM user WHERE a NOT IN (?, ?) AND b IN (?, ?, ?)
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```
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# Cases
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* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
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* [Wego](http://github.com/go-tango/wego)
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* [Docker.cn](https://docker.cn/)
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* [Gogs](http://try.gogits.org) - [github.com/gogits/gogs](http://github.com/gogits/gogs)
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* [Gorevel](http://gorevel.cn/) - [github.com/goofcc/gorevel](http://github.com/goofcc/gorevel)
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* [Gowalker](http://gowalker.org) - [github.com/Unknwon/gowalker](http://github.com/Unknwon/gowalker)
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* [Gobuild.io](http://gobuild.io) - [github.com/shxsun/gobuild](http://github.com/shxsun/gobuild)
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* [Sudo China](http://sudochina.com) - [github.com/insionng/toropress](http://github.com/insionng/toropress)
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* [Godaily](http://godaily.org) - [github.com/govc/godaily](http://github.com/govc/godaily)
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* [YouGam](http://www.yougam.com/)
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* [GoCMS - github.com/zzboy/GoCMS](https://github.com/zzdboy/GoCMS)
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* [GoBBS - gobbs.domolo.com](http://gobbs.domolo.com/)
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* [go-blog](http://wangcheng.me) - [github.com/easykoo/go-blog](https://github.com/easykoo/go-blog)
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# Discuss
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Please visit [Xorm on Google Groups](https://groups.google.com/forum/#!forum/xorm)
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# Contributing
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If you want to pull request, please see [CONTRIBUTING](https://github.com/go-xorm/xorm/blob/master/CONTRIBUTING.md)
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# LICENSE
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BSD License
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[http://creativecommons.org/licenses/BSD/](http://creativecommons.org/licenses/BSD/)
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