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
73 lines
1.8 KiB
Go
73 lines
1.8 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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//type User struct {
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// ID uint `gorm:"primaryKey"`
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// Name string `gorm:"size:100"`
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// Email string `gorm:"size:100;unique"`
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// Age int
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// CreatedAt time.Time
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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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// 先插入测试数据
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db.AutoMigrate(&User{})
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db.Create(&User{Name: "Alice", Email: "alice@example.com", Age: 30})
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db.Create(&User{Name: "Bob", Email: "bob@example.com", Age: 25})
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db.Create(&User{Name: "Charlie", Email: "charlie@example.com", Age: 35})
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// 1. 根据 ID 查询
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var user User
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db.First(&user, 1) // 查询 ID=1 的用户
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fmt.Printf("User ID=1: %s (%s)\n", user.Name, user.Email)
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// 2. 按条件查询单条
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var user2 User
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db.Where("email = ?", "bob@example.com").First(&user2)
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fmt.Printf("User by email: %s (age=%d)\n", user2.Name, user2.Age)
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// 3. 查询所有
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var users []User
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db.Find(&users)
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fmt.Printf("Total users: %d\n", len(users))
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// 4. 按条件查询多条
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var adults []User
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db.Where("age >= ?", 30).Find(&adults)
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fmt.Printf("Users age >= 30: %d\n", len(adults))
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// 5. 使用 IN 查询
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var selectedUsers []User
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db.Where("id IN ?", []int{1, 2}).Find(&selectedUsers)
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fmt.Printf("Selected users: %d\n", len(selectedUsers))
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// 6. 排序查询
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var sortedUsers []User
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db.Order("age DESC").Find(&sortedUsers)
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fmt.Println("Users sorted by age (DESC):")
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for _, u := range sortedUsers {
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fmt.Printf(" - %s (age=%d)\n", u.Name, u.Age)
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}
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// 7. 分页查询
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var pageUsers []User
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db.Offset(0).Limit(2).Find(&pageUsers)
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fmt.Printf("Page 1 (limit 2): %d users\n", len(pageUsers))
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// 8. 组合查询
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var combinedUsers []User
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db.Where("age > ?", 25).
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Order("age DESC").
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Limit(2).
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Find(&combinedUsers)
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fmt.Printf("Combined query: %d users\n", len(combinedUsers))
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}
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