How to avoid duplicate elements in slice in json validation?

Question

Although I am not a pro-Golang developer, I am trying to restrict the duplicate elements from my array in struct during JSON validation.

type Test struct {
Test []*string `json:"test" validate:"required,min=1,max=10,excludes=duplicate"`
}

I am using excludes parameter but it's not working for me.

Are you talking about a specific package? – Zamicol Aug 25 '22 at 21:58 — Zamicol, Aug 25 '22 at 21:58

score 5 · Answer 1 · answered May 06 '22 at 13:32

For array & slices you should use the unique tag.

type Test struct {
    Test []*string `json:"test" validate:"required,min=1,max=10,unique"`
}

Checking the docs:

For arrays & slices, unique will ensure that there are no duplicates

score 0 · Answer 2 · answered Aug 25 '22 at 22:02

0

Which will add a JSON "DisallowDuplicateFields" to the Go standard library.

answered Aug 25 '22 at 22:02

Zamicol

2 Answers2