Quickly Start

ORM examples

Beego’s ORM is designed as two:

• Normal Orm instances: These instances are stateless, so you should keep a database with only one instance if possible. Of course, even if you create a new instance every time, it’s not a big deal, it’s just not necessary;
• TxOrm: This is the Orm object obtained after starting a transaction, it can only be used within the transaction, and will be discarded after commit or rollback, and cannot be reused. A new instance needs to be created for each transaction.

Quickly Start

Exmaple:

import (
    "github.com/beego/beego/v2/client/orm"
    // don't forget this
    _ "github.com/go-sql-driver/mysql"
)
// User -
type User struct {
    ID   int    `orm:"column(id)"`
    Name string `orm:"column(name)"`
}
func init() {
    // need to register models in init
    orm.RegisterModel(new(User))
    // need to register default database
    orm.RegisterDataBase("default", "mysql", "root:123456@tcp(127.0.0.1:3306)/beego?charset=utf8")
}
func main() {
    // automatically build table
    orm.RunSyncdb("default", false, true)
    // create orm object
    o := orm.NewOrm()
    // data
    user := new(User)
    user.Name = "mike"
    // insert data
    o.Insert(user)
}

In general, it can be divided into the following steps:

• Define and register models, refer model
• Register databases, refer database
• Create Orm instances
• Execute queries, Beego provides query API, refer:
  • Orm CRUD
  • QueryBuilder
  • QuerySeter
  • RawSeter
  • QueryM2Mer

It is important to note that you must introduce the driver anonymously according to the database you are using. i.e. "github.com/go-sql-driver/mysql"

Debug log

In the development environment, you can output the SQL:

func main() {
    orm.Debug = true

When turned on, all query statements will be output, including execution, preparation, transactions, etc. Note that this option should not be turned on in production environments, as outputting logs can seriously impact performance.