go语言中struct标签详解

`key1:"value1" key2:"value2" key3:"value3"...`  // 键值对用空格分隔

type User struct {
	Name string `json:"username"` // 编码后的字段名为 username
	Age  int    `json:"userage"`  // 编码后的字段名为 userage
    Sex  string // 编码后的字段名为 Sex
    Hobby string    `json:"-"` // 字段不进行序列化
}
 
func main() {
	u1 := User{"zhangsan", 20, "男", "eat"}
	jsondata1, err := json.Marshal(u1)
 
	if err != nil {
		fmt.Println("格式错误")
	} else {
		fmt.Printf("User结构体转json：%s\n", jsondata)
	}
 
//输出
User结构体转json：{"username":"zhangsan","userage":20,"Sex":"男"}

// gorm.Model 的定义
type Model struct {
  ID        uint           `gorm:"primaryKey"`
  CreatedAt time.Time
  UpdatedAt time.Time
  DeletedAt gorm.DeletedAt `gorm:"index"`
}

type AddUserAuth struct {
	gorm.BaseModel
	UUID        string `gorm:"column:user_uuid;comment:用户UUID;type:varchar(100);"`        // 用户UUID
	User        string `gorm:"column:user_name;comment:用户名称;type:varchar(50);"`           // 用户登录名
	Cluster     string `gorm:"column:cluster_name;comment:集群名称;type:varchar(50);"`     // k8s集群
	NameSpace   string `gorm:"column:namespace;comment:命名空间;type:varchar(50);"`      // 命名空间
	ServiceName string ` gorm:"column:service_name;comment:应用名称;type:varchar(50);"` // 应用名称
	ServiceType string `gorm:"column:service_type;comment:应用类型;type:varchar(50);"` // 应用类型
}

CREATE TABLE `add_user_auths` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `created_at` datetime DEFAULT NULL,
  `updated_at` datetime DEFAULT NULL,
  `deleted_at` datetime DEFAULT NULL,
  `user_uuid` varchar(100) DEFAULT NULL COMMENT '用户UUID',
  `user_name` varchar(50) DEFAULT NULL COMMENT '用户名称',
  `cluster_name` varchar(50) DEFAULT NULL COMMENT '集群名称',
  `namespace` varchar(50) DEFAULT NULL COMMENT '命名空间',
  `service_name` varchar(50) DEFAULT NULL COMMENT '应用名称',
  `service_type` varchar(50) DEFAULT NULL COMMENT '应用类型',
  PRIMARY KEY (`id`),
  KEY `idx_add_user_auths_deleted_at` (`deleted_at`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8mb4

// 表单数据
type LoginForm struct {
    UserName  string    `form:"username"`    
    Password  string    `form:"password"`
    Email	  string    `form:"email"`  
}
// model 或 service 层Model
type Email struct {
    Email       string
    Password    string
}
 
 
func EmailLogin (c *gin.Context) {
    var email LoginForm
    if err := c.ShouldBind(&email); err != nil {
        ...
    }
    // 获取表单数据局
    args := Email {
        Email:     email.Email,
        Password:  email.Password,
    }
    // 对参数进行后续使用
    ...
}

type LoginForm struct {
    Email     string    `form:"email" binding:"email"`    
    UserName  string    `form:"username" binding:"username"`    
    Password  string    `form:"password" binging:"required,min=6,max=10"`
}

// 不同结构体校验
type S1 struct { 
    F1 string `validate:eqcsfield=S2.F2` 
    S2 struct { 
        F2 string 
    } 
}
// 同一结构体字段相同校验
type Email struct { 
    Email  string `validate:"lte=4"` 
    Pwd    string `validate:"min=10"` 
    Pwd2   string `validate:"eqfield=Pwd"`
}
// 同一结构体字段不相等
type User struct { 
    Name     string `validate:"lte=4"` 
    Age      int `validate:"min=20"` 
    Password string `validate:"min=10,nefield=Name"`
}

## 配置文件 cnf.ini
user_name  = ares
age = 20
// 配置文件映射 结构体
type Config struct {
  UserName   string `ini:"user_name"`  // ini标签指定下键名
  Age  string `ini:"age"`
}