Golang : Update database with GORM example

A simple tutorial on how to use GORM(Golang Object Relational Map) to connect to a MySQL/MariaDB database and UPDATE data.

Here you go!

 package main

 import (
 _ "github.com/go-sql-driver/mysql"

 // Activities table SQL :
 // id bigint(20)  AUTO_INCREMENT
 // username varchar(50)
 // created_on  timestamp
 // action char(1)
 // description varchar(300)
 // visibility  char(1)

 // NOTE : In the struct, CreatedOn will be translated into created_on in sql level
 type Activities struct {
 Id int `sql:"AUTO_INCREMENT"`
 Username string `sql:"varchar(50);unique"`
 CreatedOn time.Time `sql:"timestamp"`
 Action string `sql:"type:char(1)"`
 Description string `sql:"type:varchar(300)"`
 Visibility  string `sql:"type:char(1)"`

 func main() {

 dbConn, err := gorm.Open("mysql", "username:password@tcp(x0.xx0.xxx.xxx:3306)/db_name?charset=utf8&parseTime=true")

 if err != nil {


 activity := Activities{
 Username: "testuser",
 CreatedOn: time.Now().UTC(),
 Description: "Testing",
 Visibility:  "S",


 // use a clean Activities struct for update purpose
 act := Activities{}

 // Get the last record

 fmt.Println("Before update: ", act)

 fmt.Println("Created on : ", act.CreatedOn)

 currentId := act.Id

 fmt.Println("Current ID : ", currentId)

 // update the last activity struct
 act.Username = "test test test"
 act.Description = "This is a test test test description"
 act.Visibility = "A"

 //dbConn.Save(&act) // update current id

 // best practice is to include the id for the update statement
 dbConn.Where("id = ?", currentId).Save(&act)

 // Get the last record - again

 fmt.Println("After update : ", act)


Sample output :

Before update: {27570 testuser 2015-07-29 03:29:44 +0000 UTC Testing S}

Created on : 2015-07-29 03:29:44 +0000 UTC

Current ID : 27570

After update : {27570 test test test 2015-07-29 03:29:44 +0000 UTC This is a test test test description A}

References :



  See also : Golang : GORM read from database example

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.