go orm GORM

官网：https://gorm.io/

docs：https://gorm.io/docs/

博客：https://www.tizi365.com/archives/6.html

import (
    "fmt"

    "gorm.io/driver/mysql"
    "gorm.io/gorm"
)

type Product struct {
    gorm.Model
    Code  string
    Price uint
}

func main() {
    fmt.Println("main ...")

    dsn := "act:Q***wsx@tcp(127.0.0.1:3306)/tbname1?charset=utf8mb4&parseTime=True&loc=Local"
    var db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
       panic("failed to connect database")
    }

    // Migrate the schema
    db.AutoMigrate(&Product{})

    // Create
    db.Create(&Product{Code: "D4211", Price: 100})

    // Read
    var product Product
    db.First(&product, 1)                 // find product with integer primary key
    db.First(&product, "code = ?", "D42") // find product with code D42
    fmt.Println(product)

    // Update - update product's price to 200
    db.Model(&product).Update("Price", 200)
    // Update - update multiple fields
    db.Model(&product).Updates(Product{Price: 200, Code: "F42"}) // non-zero fields
    db.Model(&product).Updates(map[string]interface{}{"Price": 200, "Code": "F42"})

    // Delete - delete product
    db.Delete(&product, 1)

    fmt.Println("success ...")
}