160 lines
2.9 KiB
Markdown
160 lines
2.9 KiB
Markdown
# beego orm
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[](https://drone.io/github.com/beego/beego/v2/latest)
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A powerful orm framework for go.
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It is heavily influenced by Django ORM, SQLAlchemy.
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**Support Database:**
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* MySQL: [github.com/go-sql-driver/mysql](https://github.com/go-sql-driver/mysql)
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* PostgreSQL: [github.com/lib/pq](https://github.com/lib/pq)
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* Sqlite3: [github.com/mattn/go-sqlite3](https://github.com/mattn/go-sqlite3)
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Passed all test, but need more feedback.
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**Features:**
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* full go type support
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* easy for usage, simple CRUD operation
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* auto join with relation table
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* cross DataBase compatible query
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* Raw SQL query / mapper without orm model
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* full test keep stable and strong
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more features please read the docs
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**Install:**
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go get github.com/beego/beego/v2/orm
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## Changelog
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* 2013-08-19: support table auto create
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* 2013-08-13: update test for database types
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* 2013-08-13: go type support, such as int8, uint8, byte, rune
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* 2013-08-13: date / datetime timezone support very well
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## Quick Start
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#### Simple Usage
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```go
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package main
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import (
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"fmt"
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"github.com/beego/beego/v2/orm"
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_ "github.com/go-sql-driver/mysql" // import your used driver
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)
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// Model Struct
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type User struct {
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Id int `orm:"auto"`
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Name string `orm:"size(100)"`
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}
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func init() {
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// register model
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orm.RegisterModel(new(User))
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// set default database
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orm.RegisterDataBase("default", "mysql", "root:root@/my_db?charset=utf8", 30)
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// create table
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orm.RunSyncdb("default", false, true)
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}
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func main() {
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o := orm.NewOrm()
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user := User{Name: "slene"}
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// insert
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id, err := o.Insert(&user)
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// update
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user.Name = "astaxie"
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num, err := o.Update(&user)
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// read one
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u := User{Id: user.Id}
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err = o.Read(&u)
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// delete
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num, err = o.Delete(&u)
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}
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```
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#### Next with relation
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```go
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type Post struct {
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Id int `orm:"auto"`
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Title string `orm:"size(100)"`
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User *User `orm:"rel(fk)"`
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}
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var posts []*Post
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qs := o.QueryTable("post")
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num, err := qs.Filter("User__Name", "slene").All(&posts)
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```
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#### Use Raw sql
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If you don't like ORM，use Raw SQL to query / mapping without ORM setting
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```go
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var maps []Params
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num, err := o.Raw("SELECT id FROM user WHERE name = ?", "slene").Values(&maps)
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if num > 0 {
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fmt.Println(maps[0]["id"])
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}
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```
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#### Transaction
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```go
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o.Begin()
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...
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user := User{Name: "slene"}
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id, err := o.Insert(&user)
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if err == nil {
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o.Commit()
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} else {
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o.Rollback()
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}
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```
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#### Debug Log Queries
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In development env, you can simple use
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```go
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func main() {
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orm.Debug = true
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...
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```
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enable log queries.
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output include all queries, such as exec / prepare / transaction.
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like this:
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```go
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[ORM] - 2013-08-09 13:18:16 - [Queries/default] - [ db.Exec / 0.4ms] - [INSERT INTO `user` (`name`) VALUES (?)] - `slene`
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...
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```
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note: not recommend use this in product env.
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## Docs
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more details and examples in docs and test
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[documents](http://beego.me/docs/mvc/model/overview.md)
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