将数组结构设置为Golang中的会话

Question

I use lib github.com/ipfans/echo-session. I can save session when set array struct

This my code:

Save session

type StaffInfor struct {
    Login_id         string
    Family_name_cc   string
    First_name_cc    string
    Family_name_kana string
    First_name_kana  string
    Role_id      int
    Password     string
    Message_invalid  []string
}
~~~
session := session.Default(c)
session.Set("test", listStaffInfor)// listStaffInfor is array struct StaffInfor 
session.Save()

Get from session

session := session.Default(c)
fmt.Println(session.Get("test"))

Console result display empty

Answer 1

Library github.com/ipfans/echo-session is using github.com/gorilla/sessions internally.

Gorilla session object is serialised using the encoding/gob package. So to store a complex datatype within a session you have to register your struct .

type StaffInfor struct {
    Login_id         string
    Family_name_cc   string
    First_name_cc    string
    Family_name_kana string
    First_name_kana  string
    Role_id          int
    Password         string
    Message_invalid  []string
}

type ListStaffInfor []StaffInfor

func init() {
   gob.Register(&StaffInfor{})
   gob.Register(&ListStaffInfor{})
}

Note: If you're using cookie based session, it is not advised to store large object into session, because you might hit cookie size limitation 4KB.