system/

Package uuid provides implementation of Universally Unique Identifier (UUID).

Package validation for validations import ( "github.com/astaxie/beego/validation" "log" ) type User struct { Name string Age int } func main() { u := User{"man", 40} valid := validation.Validation{} valid.Required(u.Name, "name") valid.MaxSize(u.Name, 15, "nameMax") valid.Range(u.Age, 0, 140, "age") if valid.HasErrors() { // validation does not pass // print invalid message for _, err := range valid.Errors { log.Println(err.Key, err.Message) } } // or use like this if v := valid.Max(u.Age, 140, "ageMax"); !v.Ok { log.Println(v.Error.Key, v.Error.Message) } } more info: http://beego.me/docs/mvc/controller/validation.md