Regex Phone Number Using Validation V2 Golang Package Not Working - regex

Question

I am having some trouble when using github.com/go-validator/validator to validate regex some phone numbers with this prefix +62, 62, 0, for instance number e.g. +628112blabla, 0822blablabla, 628796blablabla.
I have try my regex on online regex tester and no issue with the regex on that. Here the regex is :
(0|\+62|062|62)[0-9]+$
But when I try with my go implement with it, the regex not working. This is my code for implement the purpose :
type ParamRequest struct {
PhoneNumber string `validate:"nonzero,regexp=(0|\+62|062|62)[0-9]+$"`
ItemCode string `validate:"nonzero"`
CallbackUrl string `validate:"nonzero"`
}
func (c *TopupAlloperatorApiController) Post() {
var v models.TopupAlloperatorApi
interf := make(map[string]interface{})
json.Unmarshal(c.Ctx.Input.RequestBody, &interf)
logs.Debug(" Json Input Request ", interf)
var phone, item, callback string
if _, a := interf["PhoneNumber"].(string); a {
phone = interf["PhoneNumber"].(string)
}
if _, b := interf["ItemCode"].(string); b {
item = interf["ItemCode"].(string)
}
if _, c := interf["CallbackUrl"].(string); c {
callback = interf["CallbackUrl"].(string)
}
ve := ParamRequest{
PhoneNumber: phone,
ItemCode: item,
CallbackUrl: callback,
}
logs.Debug(" Param Request ", ve)
err := validator.Validate(ve)
if err == nil {
//success
}else{
// not success
}
Many thanks for anything help. Thank you.

Answer 1

Because you are using regexp to check PhoneNumber that won't be matching if the value is empty it is better to remove nonzero from the validation.
I have checked out documentation and haven't found examples where you can use both: nonzero and regexp.
Also you need to make your regex symbol-escaped, otherwise it won't be detected by reflection. It means you should use (0|\\+62|062|62)[0-9]+$ in your code. Here is example where problem is: symbol escaping in struct tags
And also, please try to use this regexp: ^\\+{0,1}0{0,1}62[0-9]+$