Golang - Validator.v9操作

1、請看示例代碼

/**
 * Created by Goland.
 * User: yan.wang5
 * Date: 2019/12/01
 */
package main

import (
	"fmt"
	"github.com/go-playground/locales/en"
	"github.com/go-playground/locales/zh"
	"github.com/go-playground/universal-translator"
	"gopkg.in/go-playground/validator.v9"
	en_translations "gopkg.in/go-playground/validator.v9/translations/en"
	zh_translations "gopkg.in/go-playground/validator.v9/translations/zh"
	"reflect"
	"regexp"
)

var vd *validator.Validate
var translators = make(map[string]ut.Translator, 2)

// 初始化驗證器
func init() {
	vd = validator.New()

	// 使用json標籤
	vd.RegisterTagNameFunc(func(field reflect.StructField) string {
		return field.Tag.Get("json")
	})

	// 註冊英文錯誤提示器
	_en := en.New()
	translators["en"], _ = ut.New(_en, _en).GetTranslator("en")
	_ = en_translations.RegisterDefaultTranslations(vd, translators["en"])

	// 註冊中文錯誤提示器
	_zh := zh.New()
	translators["zh"], _ = ut.New(_zh, _zh).GetTranslator("zh")
	_ = zh_translations.RegisterDefaultTranslations(vd, translators["zh"])

	// 註冊一個國家碼驗證器
	_ = vd.RegisterValidation("cc", func(fl validator.FieldLevel) bool {
		ok, _ := regexp.MatchString(`^[1-9][0-9]{1,2}$`, fl.Field().String())
		return ok
	})
	RegisterTagTranslation("cc", map[string]string{
		"en": "{0} is a invalid cc.",
		"zh": "{0}不是一個可用的國家碼",
	})

	// 註冊一個手機號碼驗證器
	_ = vd.RegisterValidation("phone", func(fl validator.FieldLevel) bool {
		ok, _ := regexp.MatchString(`^1[3-9][0-9]{9}$`, fl.Field().String())
		return ok
	})
	RegisterTagTranslation("phone", map[string]string{
		"en": "{0} is a invalid phone.",
		"zh": "{0}不是一個可用的手機號碼",
	})

	// 給required_with添加翻譯
	RegisterTagTranslation("required_with", map[string]string{
		"en": "{0} is required field.",
		"zh": "{0}是一個必填字段",
	})
}

// 自定義翻譯
func RegisterTagTranslation(tag string, messages map[string]string) {
	for lang, message := range messages {
		_ = vd.RegisterTranslation(tag, translators[lang], func(ut ut.Translator) error {
			return ut.Add(tag, message, false)
		}, func(ut ut.Translator, fe validator.FieldError) string {
			t, err := ut.T(fe.Tag(), fe.Field())
			if err != nil {
				return fe.(error).Error()
			}
			return t
		})
	}
}

type User struct {
	Cc    string `json:"cc" validate:"omitempty,cc"`
	Phone string `json:"phone" validate:"required_with=Cc,omitempty,phone"`
	Age   uint   `json:"age" validate:"min=10"`
}

func main() {
	var user = User{Cc: "1",Phone: "123", Age: 9}

	if errs := vd.Struct(&user); errs != nil {
		for _, err := range errs.(validator.ValidationErrors) {
			fmt.Printf("%s\n", err.Translate(translators["zh"]))
		}
	}

	/*
		cc不是一個可用的國家碼
		phone不是一個可用的手機號碼
		age最小隻能爲10
	*/
}

2、驗證規則

英文文檔：https://godoc.org/gopkg.in/go-playground/validator.v9

字段

required

required_with

required_with_all

required_without

required_without_all

isdefault

len

min

max

eq

ne

lt

lte

gt

gte

eqfield

eqcsfield

necsfield

gtcsfield

gtecsfield

ltcsfield

ltecsfield

nefield

gtefield

gtfield

ltefield

ltfield

fieldcontains

fieldexcludes

alpha

alphanum

alphaunicode

alphanumunicode

numeric

number

hexadecimal

hexcolor

rgb

rgba

hsl

hsla

email

url

uri

urn_rfc2141

file

base64

base64url

contains

containsany

containsrune

excludes

excludesall

excludesrune

startswith

endswith

isbn

isbn10

isbn13

eth_addr

btc_addr

btc_addr_bech32

uuid

uuid3

uuid4

uuid5

uuid_rfc4122

uuid3_rfc4122

uuid4_rfc4122

uuid5_rfc4122

ascii

printascii

multibyte

datauri

latitude

longitude

ssn

ipv4

ipv6

ip

cidrv4

cidrv6

cidr

tcp4_addr

tcp6_addr

tcp_addr

udp4_addr

udp6_addr

udp_addr

ip4_addr

ip6_addr

ip_addr

unix_addr

mac

hostname

hostname_rfc1123

fqdn

unique

oneof

html

html_encoded

url_encoded

dir