1. 自定义验证

    3. import (
    4.     "net/http"
    5.     "reflect"
    6.     "time"
    8.     "github.com/gin-gonic/gin"
    9.     "github.com/gin-gonic/gin/binding"
    10.     "gopkg.in/go-playground/validator.v8"
    11. )
    13. // Booking contains binded and validated data.
    14. type Booking struct {
    15.     //定义一个预约的时间大于今天的时间
    16.     CheckIn time.Time `form:"check_in" binding:"required,bookabledate" time_format:"2006-01-02"`
    17.     //gtfield=CheckIn退出的时间大于预约的时间
    18.     CheckOut time.Time `form:"check_out" binding:"required,gtfield=CheckIn" time_format:"2006-01-02"`
    20. func bookableDate(
    21.     v *validator.Validate, topStruct reflect.Value, currentStructOrField reflect.Value,
    22.     field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string,
    23. ) bool {
    24.     //field.Interface().(time.Time)获取参数值并且转换为时间格式
    25.     if date, ok := field.Interface().(time.Time); ok {
    26.         today := time.Now()
    27.         if today.Unix() > date.Unix() {
    28.             return false
    29.         }
    30.     }
    31.     return true
    32. }
    34. func main() {
    35.     route := gin.Default()
    36.     //注册验证
    38.         v.RegisterValidation("bookabledate", bookableDate)
    39.     }
    41.     route.GET("/5lmh", getBookable)
    42.     route.Run()
    43. }
    45. func getBookable(c *gin.Context) {
    46.     var b Booking
    47.     if err := c.ShouldBindWith(&b, binding.Query); err == nil {
    48.         c.JSON(http.StatusOK, gin.H{"message": "Booking dates are valid!"})
    49.     } else {
    50.         c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
    51.     }
    52. }
    54. // curl -X GET "http://localhost:8080/5lmh?check_in=2019-11-07&check_out=2019-11-20"