如何在Golang中搭建基础的在线商城项目

go mod init your-mall-project
go get -u github.com/gin-gonic/gin

mall/
├── main.go
├── router/
│   └── router.go
├── handler/
│   ├── user_handler.go
│   ├── product_handler.go
│   └── order_handler.go
├── model/
│   ├── user.go
│   ├── product.go
│   └── order.go
├── service/
│   ├── user_service.go
│   ├── product_service.go
│   └── order_service.go
├── repository/
│   └── db.go
└── config/
    └── config.go

type Product struct {
    ID          uint    `json:"id" gorm:"primarykey"`
    Name        string  `json:"name"`
    Description string  `json:"description"`
    Price       float64 `json:"price"`
    Stock       int     `json:"stock"`
}

type User struct {
    ID       uint   `json:"id" gorm:"primarykey"`
    Username string `json:"username" gorm:"unique"`
    Password string `json:"password"`
}

type Order struct {
    ID       uint      `json:"id" gorm:"primarykey"`
    UserID   uint      `json:"user_id"`
    Products []Product `json:"products" gorm:"many2many:order_products;"`
    Total    float64   `json:"total"`
    CreatedAt time.Time `json:"created_at"`
}

func SetupRouter() *gin.Engine {
    r := gin.Default()
    v1 := r.Group("/api/v1")
    {
        v1.GET("/products", handler.GetProducts)
        v1.POST("/orders", handler.CreateOrder)
        v1.POST("/users/register", handler.RegisterUser)
    }
    return r
}

func GetProducts(c *gin.Context) {
    products, err := service.GetAllProducts()
    if err != nil {
        c.JSON(500, gin.H{"error": err.Error()})
        return
    }
    c.JSON(200, products)
}

var DB *gorm.DB

func InitDB() {
    var err error
    dsn := "root:123456@tcp(127.0.0.1:3306)/mall?charset=utf8mb4&parseTime=True&loc=Local"
    DB, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
        panic("failed to connect database")
    }
    DB.AutoMigrate(&model.User{}, &model.Product{}, &model.Order{})
}

func main() {
    repository.InitDB()
    r := router.SetupRouter()
    r.Run(":8080")
}