vendor/gopkg.in/go-playground/validator.v9/_examples/gin-upgrading-overriding/v8_to_v9.go

   1 package main
   2
   3 import (
   4         "reflect"
   5         "sync"
   6
   7         "github.com/gin-gonic/gin/binding"
   8         "gopkg.in/go-playground/validator.v9"
   9 )
  10
  11 type defaultValidator struct {
  12         once     sync.Once
  13         validate *validator.Validate
  14 }
  15
  16 var _ binding.StructValidator = &defaultValidator{}
  17
  18 func (v *defaultValidator) ValidateStruct(obj interface{}) error {
  19
  20         if kindOfData(obj) == reflect.Struct {
  21
  22                 v.lazyinit()
  23
  24                 if err := v.validate.Struct(obj); err != nil {
  25                         return error(err)
  26                 }
  27         }
  28
  29         return nil
  30 }
  31
  32 func (v *defaultValidator) lazyinit() {
  33         v.once.Do(func() {
  34                 v.validate = validator.New()
  35                 v.validate.SetTagName("binding")
  36
  37                 // add any custom validations etc. here
  38         })
  39 }
  40
  41 func kindOfData(data interface{}) reflect.Kind {
  42
  43         value := reflect.ValueOf(data)
  44         valueType := value.Kind()
  45
  46         if valueType == reflect.Ptr {
  47                 valueType = value.Elem().Kind()
  48         }
  49         return valueType
  50 }