package main

import (
    "time"

    "log"

    "fmt"

    "github.com/jinzhu/gorm"
    _ "github.com/jinzhu/gorm/dialects/postgres"
)

type Product struct {
    gorm.Model
    Code     string
    Birthday time.Time
}

func main() {
    db, err := gorm.Open("postgres", "host=localhost user=sdp dbname=sdp sslmode=disable password=sdp")
    if err != nil {
        log.Print(err)
        panic("failed to connect database")
    }
    defer db.Close()

    //db.Set("timezone", "Asia/Tehran")
    db.LogMode(true)

    // Read
    var product Product
    db.First(&product, 1) // find product with id 1

    // Update - update product's price to 2000
    fmt.Println(product.Birthday)
    db.Model(&product).Update("Birthday", time.Now().Add(time.Hour))
    fmt.Println(product.Birthday)

}