There is no "exists" tag anymore and we can not use "required" tag with zero-value

[mohsenasm]

Hi,

We have upgraded from version 8 to version 10 recently.
It seems that there is no exists tag anymore and we should use required instead. But as states in this issue, there is a problem with the required tag that it doesn't allow zero-value.

What do you suggest?

[frederikhors]

@mohsenasm can this help you? #691

If yes please close the issue. Thanks.

[mohsenasm]

Thanks. It's now clear.
So we should use *int if we want to allow zero-value.

type User struct {
	Age *int `validate:"required"`
}

age := 0
user := &User{Age: &age}
err := validate.Struct(user) // err == nil

user2 := &User{Age: nil}
err2 := validate.Struct(user2) // err != nil

type User struct {
	Age int `validate:"required"`
}

age := 0
user := &User{Age: age}
err := validate.Struct(user) // err != nil