b010f82221
- 实现用户注册、登录、JWT令牌认证功能 - 集成Gin、GORM、Viper、Zap等框架 - 添加密码加密、数据库操作、中间件等完整功能 - 配置多环境支持、日志轮转、CORS处理 - 创建完整的项目结构和配置文件体系
62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package main
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import (
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"fmt"
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"gorm.io/driver/sqlite"
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"gorm.io/gorm"
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)
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// 用户拥有多个订单
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//type User struct {
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// ID uint `gorm:"primaryKey"`
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// Name string `gorm:"size:100"`
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// Orders []Order // 一对多关联
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//}
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//
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//type Order struct {
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// ID uint `gorm:"primaryKey"`
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// UserID uint // 外键
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// Product string `gorm:"size:100"`
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// Amount int
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//}
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func main() {
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db, _ := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
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db.AutoMigrate(&User{}, &Order{})
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// 1. 创建用户和订单
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user := User{
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Name: "Alice",
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Orders: []Order{
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{Product: "Laptop", Amount: 1},
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{Product: "Mouse", Amount: 2},
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{Product: "Keyboard", Amount: 1},
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},
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}
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db.Create(&user)
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fmt.Println("User and orders created")
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// 2. 预加载查询
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var result User
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db.Preload("Orders").First(&result, user.ID)
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fmt.Printf("User: %s, Orders: %d\n", result.Name, len(result.Orders))
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for _, order := range result.Orders {
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fmt.Printf(" - %s (x%d)\n", order.Product, order.Amount)
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}
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// 3. 添加新订单
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newOrder := Order{UserID: user.ID, Product: "Monitor", Amount: 1}
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db.Create(&newOrder)
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fmt.Println("New order added")
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// 4. 查询用户的所有订单
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var orders []Order
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db.Where("user_id = ?", user.ID).Find(&orders)
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fmt.Printf("Total orders: %d\n", len(orders))
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// 5. 删除某个订单
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db.Delete(&Order{}, orders[0].ID)
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fmt.Println("First order deleted")
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}
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