8.6 KiB

Raw Blame History

Xorm is a simple and powerful ORM for Go.

Notice

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.

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
Simple cascade loading support
Optimistic Locking support
SQL Builder support via 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
MyMysql: github.com/ziutek/mymysql/godrv
Postgres: github.com/lib/pq
Tidb: github.com/pingcap/tidb
SQLite: github.com/mattn/go-sqlite3
MsSql: github.com/denisenkom/go-mssqldb
Oracle: github.com/mattn/go-oci8 (experiment)

Changelog

v0.6.2
- refactor tag parse methods
- add Scan features to Get
- add QueryString method
v0.6.0
- remove support for ql
- add query condition builder support via 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
v0.5.0
- logging interface changed
- some bugs fixed
v0.4.5
- many bugs fixed
- extends support unlimited deepth
- Delete Limit support
v0.4.4
- ql database expriment support
- tidb database expriment support
- sql.NullString and etc. field support
- select ForUpdate support
- many bugs fixed

More changes ...

Installation

go get github.com/go-xorm/xorm

Documents

Quick Start

Create Engine

engine, err := xorm.NewEngine(driverName, dataSourceName)

Define a struct and Sync2 table struct to database

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))

Query runs a SQL string, the returned results is []map[string][]byte, QueryString returns []map[string]string.

results, err := engine.Query("select * from user")

results, err := engine.QueryString("select * from user")

Execute runs a SQL string, it returns affetcted and error

affected, err := engine.Exec("update user set age = ? where name = ?", age, name)

Insert one or multiple records to database

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

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
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 = ?

Query multiple records from database, also you can use join and extends

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

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.

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

affected, err := engine.Where(...).Delete(&user)
// DELETE FROM user Where ...
affected, err := engine.Id(2).Delete(&user)

Count records

counts, err := engine.Count(&user)
// SELECT count(*) AS total FROM user

Query conditions builder

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

Discuss

Please visit Xorm on Google Groups

Contributing

If you want to pull request, please see CONTRIBUTING

LICENSE

BSD License http://creativecommons.org/licenses/BSD/

8.6 KiB Raw Blame History