路由注册

    route := gin.Default()
    //注册验证模版
    if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
        v.RegisterValidation("bookabledate", bookableDate)
    }
    route.GET("/bookable", getBookable)
    route.Run(":8085")

注册验证规则

func bookableDate(
    v *validator.Validate, topStruct reflect.Value, currentStructOrField reflect.Value,
    field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string,
) bool {
    fmt.Println(topStruct,currentStructOrField,field,fieldType,fieldKind,param)
    if date, ok := field.Interface().(string); ok {
        if date == "1" {
            return false
        }
    }
    return true
}

定义接受结构体

type Booking struct {
    CheckIn  string `form:"check_in" binding:"required,bookabledate"`
    CheckOut string `form:"check_out" binding:"required,bookabledate"`
}

控制器参数绑定

func getBookable(c *gin.Context) {
    var b Booking
    if err := c.ShouldBindWith(&b, binding.Query); err == nil {
        fmt.Println(b)
        c.JSON(http.StatusOK, gin.H{"message": "Booking dates are valid!"})
    } else {
        c.JSON(http.StatusOK, gin.H{"error": err.Error()})
    }
}