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Lunny Xiao
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README.md
142
README.md
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@ -88,6 +88,148 @@ Or
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* [GoWalker](http://gowalker.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 multipe 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 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 to use Cols, AllCols and etc.
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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(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 has conditon
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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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```
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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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# Cases
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# Cases
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* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
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* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
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143
README_CN.md
143
README_CN.md
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@ -84,8 +84,149 @@ xorm是一个简单而强大的Go语言ORM库. 通过它可以使数据库操作
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* [Godoc代码文档](http://godoc.org/github.com/go-xorm/xorm)
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* [Godoc代码文档](http://godoc.org/github.com/go-xorm/xorm)
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# 快速开始
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## 案例
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## 第一步创建引擎，driverName, dataSourceName和database/sql接口相同
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```Go
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engine, err := xorm.NewEngine(driverName, dataSourceName)
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```
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## 定义一个和表同步的结构体，并且自动同步结构体到数据库
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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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## 最原始的也支持SQL语句查询，返回的结果类型为 []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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## 执行一个SQL语句
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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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## 插入一条或者多条记录
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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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## 查询单条记录
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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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## 查询多条记录，当然可以使用Join和extends来组合使用
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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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## 根据条件遍历数据库，可以有两种方式: 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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## 更新数据，除非使用Cols,AllCols函数指明，默认只更新非空和非0的字段
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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(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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## 删除记录，需要注意，删除必须至少有一个条件，否则会报错。要清空数据库可以用EmptyTable
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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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```
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## 获取记录条数
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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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# 案例
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* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
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* [github.com/m3ng9i/qreader](https://github.com/m3ng9i/qreader)
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