validation rule based on the value of another field

[cuotos]

Is it possible to validate one field depending on the value of a different field?

I have a field called "action", if it holds the value "create", I want a different field to be Required. But if "action" is "delete" then the other field is allowed to be empty.

[cuotos]

I got this working by creating a validation function and wrapping that in validation.By() and adding this to the "manifest" fields validation rules.

    requireManifestForCreateAction := func(v interface{}) error {
        if e.Action == "create" {
            return validation.Validate(v, validation.Required)
        }
        return nil
    }