Package admin healthcheck type DatabaseCheck struct { } func (dc *DatabaseCheck) Check() error { if dc.isConnected() { return nil } else { return errors.New("can't connect database") } } AddHealthCheck("database",&DatabaseCheck{}) more docs: http://beego.me/docs/module/toolbox.md.

bean is a basic package it should not depend on other modules except common module, log module and config module.

Package config is used to parse config.

Package logs provide a general log interface Usage: import "github.com/beego/beego/v2/core/logs" log := NewLogger(10000) log.SetLogger("console", "") > the first params stand for how many channel Use it like this: log.Trace("trace") log.Info("info") log.Warn("warning") log.Debug("debug") log.Critical("critical") more docs http://beego.me/docs/module/logs.md.

Package validation for validations import ( "github.com/beego/beego/v2/core/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.