gin內置驗證器使用

func TopicUrl(f1 validator.FieldLevel) bool { return true //返回true表示驗證成功 } func main(){ router:=gin.Default() if v, ok := binding.Validator.Engine().(*validator.Validate); ok { //類型斷言 v.RegisterValidation("topicurl", TopicUrl) //注冊調用tag和自定義驗證器 } 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"` //長度4到20之間 TopicShortTitle string `form:"stitle" json:"stitle" binding:"required,nefield=ToipcTitle"`//required非空,nfield不能等於TopicTitle字段 UserIP string `form:"ip" json:"ip" binding:"ipv4"` TopicScore int `form:"score" json:"score" binding:"omitempty,gt=5"` //omitempty要么不傳，傳的話就要大於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"` //綁定自定義的topicurl驗證器 } type Topics struct { TopicList [] *Topic `form:"topiclist" json:"topiclist" binding:"gt=0,lt=3,dive"` //dive表示進入列表或數組里面的字段去驗證，這里是驗證上面的Topic，dive要寫在后面，不然如果lt寫在dive后面就是驗證里面的數據的lt>3，而不是列表的lt>3 Size int `form:"size" json:"size"`
}

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