Beedb

❗ IMPORTANT: Beedb is being deprecated in favor of Beego.orm ❗

Beedb is an ORM for Go. It lets you map Go structs to tables in a database. It's intended to be very lightweight, doing very little beyond what you really want. For example, when fetching data, instead of re-inventing a query syntax, we just delegate your query to the underlying database, so you can write the "where" clause of your SQL statements directly. This allows you to have more flexibility while giving you a convenience layer. But beedb also has some smart defaults, for those times when complex queries aren't necessary.

Right now, it interfaces with Mysql/SQLite/PostgreSQL/DB2/MS ADODB/ODBC/Oracle. The goal however is to add support for other databases in the future, including maybe MongoDb or NoSQL?

Relationship-support is not implemented, for this we will recommend you to use Beego.orm.

All in all, it's not entirely ready for advanced use yet, but it's getting there.

Drivers for Go's sql package which support database/sql includes:

Mysql:github.com/ziutek/mymysql/godrv[*]

Mysql:github.com/Go-SQL-Driver/MySQL[*]

PostgreSQL:github.com/bmizerany/pq[*]

SQLite:github.com/mattn/go-sqlite3[*]

DB2: bitbucket.org/phiggins/go-db2-cli

MS ADODB: github.com/mattn/go-adodb[*]

ODBC: bitbucket.org/miquella/mgodbc[*]

Oracle: github.com/mattn/go-oci8

Drivers marked with a [*] are tested with Beedb

API Interface

wiki/API-Interface

Installing Beedb

go get github.com/astaxie/beedb

How do we use it?

Open a database link(may be will support ConnectionPool in the future)

db, err := sql.Open("mymysql", "test/xiemengjun/123456")
if err != nil {
	panic(err)
}
orm := beedb.New(db)

with PostgreSQL,

orm := beedb.New(db, "pg")

Open Debug log, turn on the debug

beedb.OnDebug=true

Model a struct after a table in the db

type Userinfo struct {
	Uid		int	`beedb:"PK" sql:"UID" tname:"USER_INFO"` //if the table's PrimaryKey is not "Id", use this tag
	Username	string `sql:"USERNAME"`
	Departname	string `sql:"DEPARTNAME"`
	Created		time.Time `sql:"CREATED"`
}

###Caution The structs Name 'UserInfo' will turn into the table name 'USER_INFO', as defined by the tname tag. If the key 'UserName' will turn into the select colum 'USERNAME' because of the sql tag.

Create an object and save it

var saveone Userinfo
saveone.Username = "Test Add User"
saveone.Departname = "Test Add Departname"
saveone.Created = time.Now()
orm.Save(&saveone)

Saving new and existing objects

saveone.Username = "Update Username"
saveone.Departname = "Update Departname"
saveone.Created = time.Now()
orm.Save(&saveone)  //now saveone has the primarykey value it will update

Fetch a single object

var user Userinfo
orm.Where("uid=?", 27).Find(&user)

var user2 Userinfo
orm.Where(3).Find(&user2) // this is shorthand for the version above

var user3 Userinfo
orm.Where("name = ?", "john").Find(&user3) // more complex query

var user4 Userinfo
orm.Where("name = ? and age < ?", "john", 88).Find(&user4) // even more complex

Fetch multiple objects

var allusers []Userinfo
err := orm.Where("id > ?", "3").Limit(10,20).FindAll(&allusers) //Get id>3 limit 10 offset 20

var tenusers []Userinfo
err := orm.Where("id > ?", "3").Limit(10).FindAll(&tenusers) //Get id>3 limit 10  if omit offset the default is 0

var everyone []Userinfo
err := orm.FindAll(&everyone)

Find result as Map

//Original SQL Backinfo resultsSlice []map[string][]byte
//default PrimaryKey id
a, _ := orm.SetTable("userinfo").SetPK("uid").Where(2).Select("uid,username").FindMap()

Update with Map

t := make(map[string]interface{})
var j interface{}
j = "astaxie"
t["username"] = j
//update one
orm.SetTable("userinfo").SetPK("uid").Where(2).Update(t)

Update batch with Map

orm.SetTable("userinfo").Where("uid>?", 3).Update(t)

Insert data with Map

add := make(map[string]interface{})
j = "astaxie"
add["username"] = j
j = "cloud develop"
add["departname"] = j
j = "2012-12-02"
add["created"] = j
orm.SetTable("userinfo").Insert(add)

Insert batch with map

addslice := make([]map[string]interface{})
add:=make(map[string]interface{})
add2:=make(map[string]interface{})
j = "astaxie"
add["username"] = j
j = "cloud develop"
add["departname"] = j
j = "2012-12-02"
add["created"] = j
j = "astaxie2"
add2["username"] = j
j = "cloud develop2"
add2["departname"] = j
j = "2012-12-02"
add2["created"] = j
addslice =append(addslice, add, add2)
orm.SetTable("userinfo").Insert(addslice)

Join Table

a, _ := orm.SetTable("userinfo").Join("LEFT", "userdeatail", "userinfo.uid=userdeatail.uid").Where("userinfo.uid=?", 1).Select("userinfo.uid,userinfo.username,userdeatail.profile").FindMap()

Group By And Having

a, _ := orm.SetTable("userinfo").GroupBy("username").Having("username='astaxie'").FindMap()

Nesting Models (inline)

type SQLModel struct {
	Id       int       `beedb:"PK" sql:"id"`
	Created  time.Time `sql:"created"`
	Modified time.Time `sql:"modified"`
}
type User struct {
	SQLModel `sql:",inline"`
	Name     string `sql:"name" tname:"fn_group"`
	Auth     int    `sql:"auth"`
}
// the SQL table has the columns: id, name, auth, created, modified
// They are marshalled and unmarshalled automatically because of the inline keyword

LICENSE

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