Required etc. are ignored on pointer to struct fields

[rodcheater]

• [x] I have looked at the documentation here first?
• [x] I have looked at the examples provided that may showcase my question here?

Package version eg. v9, v10:

v10

Issue, Question or Enhancement:

It seems that tags that would reasonably apply to fields which are pointers to structs (such as required and excluded_without) are ignored. Looking at the code, pointer types are substituted for their underlying type at util.go:25, and because the underlying type is a struct type, the tags are therefore ignored.

Code sample, to showcase or reproduce:

import (
    "testing"

    "github.com/go-playground/validator/v10"
    . "github.com/smartystreets/goconvey/convey"
)

type Struct struct {
    Notes     string
    NotesInfo *NotesInfo `validate:"excluded_without=Notes"`
}

type NotesInfo struct{}

func TestValidateStruct(t *testing.T) {
    Convey("Given a struct", t, func() {
        s := Struct{
            NotesInfo: &NotesInfo{},
        }
        Convey("And it is not valid", func() {
            Convey("When validating", func() {
                err := validator.New().Struct(s)
                Convey("Then there is an error", func() {
                    So(err, ShouldNotBeNil)
                })
            })
        })
    })
}

[kszafran]

That looks related to a problem I'm experiencing. I'd like to have a custom validator on a struct or struct pointer field.

type TestStruct struct {
    Geometry *types.Geometry `json:"geometry" binding:"required,something"`
}

func TestValidator(t *testing.T) {
    v := validator.New()
    require.NoError(t, v.RegisterValidation("something", func(fl validator.FieldLevel) bool {
        fmt.Println("I'm here!")
        return false
    }))

    input := `{
      "geometry": {
        "coordinates": [
          31.857764026082037,
          6.866345106185449
        ],
        "type": "Point"
      }
    }`

    var obj TestStruct
    require.NoError(t, json.Unmarshal([]byte(input), &obj))
    require.Error(t, v.Struct(obj))
}

I can't do it with a struct-level validator, because it doesn't get access to the tag, so I couldn't have e.g. validate:"required,geom=2d point".