gin内置验证器使用

func TopicUrl(f1 validator.FieldLevel) bool { return true //返回true表示验证成功 } func main(){ router:=gin.Default() if v, ok := binding.Validator.Engine().(*validator.Validate); ok { //类型断言 v.RegisterValidation("topicurl", TopicUrl) //注册调用tag和自定义验证器 } v1:=router.Group("/v1/topics") { v1.GET("/:topic_id",GetTopicDetail) } } 

type Topic struct { TopicID int `form:"id" json:"id"` TopicTitle string `form:"title" json:"title" binding:"min=4,max=20"` //长度4到20之间 TopicShortTitle string `form:"stitle" json:"stitle" binding:"required,nefield=ToipcTitle"`//required非空,nfield不能等于TopicTitle字段 UserIP string `form:"ip" json:"ip" binding:"ipv4"` TopicScore int `form:"score" json:"score" binding:"omitempty,gt=5"` //omitempty要么不传，传的话就要大于5 } 

type Topic struct { TopicID int `form:"id" json:"id"` TopicTitle string `form:"title" json:"title" binding:"min=4,max=20"` TopicShortTitle string `form:"stitle" json:"stitle" binding:"required,nefield=TopicTitle"` UserIP string `form:"ip" json:"ip" binding:"ipv4"` TopicScore int `form:"score" json:"score" binding:"omitempty,gt=5"` TopicUrl string `form:"url" json:"url" binding:"topicurl"` //绑定自定义的topicurl验证器 } type Topics struct { TopicList [] *Topic `form:"topiclist" json:"topiclist" binding:"gt=0,lt=3,dive"` //dive表示进入列表或数组里面的字段去验证，这里是验证上面的Topic，dive要写在后面，不然如果lt写在dive后面就是验证里面的数据的lt>3，而不是列表的lt>3 Size int `form:"size" json:"size"`
}

转载: https://www.cnblogs.com/hualou/p/12070821.html