null tag: support integers

[hazcod]

Hi, for my API endpoint I need to make sure that people do not try to use their own primary keys. This is done via:

type Custom struct {
    Id          uint32      `pg:"id,pk" json:"id" validate:"null"`
}

But this still goes through if I post with {"id":1}

[msiner]

The tag name is incorrect. Instead of "validate" it needs to be "valid". I believe the example below shows the behavior you are expecting.

type Custom struct {
    Id uint32 `pg:"id,pk" json:"id" valid:"null"`
}

func main() {
    x := Custom{Id: 1}
    ok, err := govalidator.ValidateStruct(x)
    fmt.Println(ok, err)
    y := Custom{}
    ok, err = govalidator.ValidateStruct(y)
    fmt.Println(ok, err)
}

Output:

false id: 1 does not validate as null
true <nil>