Validating unexported fields

[Jwata]

Package version eg. v8, v9:

v8 and v9

Question:

I was wondering if it's possible to validate unexported fields. But unexported fields are skipped here.
https://github.com/go-playground/validator/blob/v9/cache.go#L131

Is there any reason for it?

[deankarn]

@Jwata A package can only view the unexported fields of types within its own package and so they must be ignored or there will be an exception; this is true of all packages using reflect even the son package.

[Jwata]

OK, so they must be exported to do validate using reflection.

[fuintis]

As far as i know reflect can read an unexported field, but write can't. Check the following link: https://yourbasic.org/golang/access-private-field-reflection/. Also you can use reflect2 package as json-iterator/extra do: https://godoc.org/github.com/json-iterator/go/extra#SupportPrivateFields.

Is there's a way that you considirer validate unexported fields?

Many thanks un advance.

[deankarn]

@fuintis thanks for the link, I could have sworn this was not possible but I’ll take another look! love to support unexported fields if I can

[bmassemin]

Should this issue be reopened ?
It could be handy to have a validation on unexported fields when you want your struct to be immutable.

[sz-po]

Same here. This issue completely breaks DDD entity pattern.

[gl19]

Also have the same feeling. Would love this to be looked into.

[Antonboom]

+1

[hampgoodwin]

Yeah,
This would be fantastic if it's possible 🙏

[dixonwhitmire]

Just chiming in. I ran into this issue today. I am new to Go, but happy to help develop, test, or review a proposed solution!

[dixonwhitmire]

Just chiming in. I ran into this issue today. I am new to Go, but happy to help develop, test, or review a proposed solution!

Hello @Jwata and @deankarn ! I just saw that this issue is re-opened. Is there anything I can do to help?

[Jwata]

I reopened this thread because other people also want this feature.

Is there anything I can do to help?

It seems @fuintis gave some ideas, which you may want to check.