How to make such validation in YII2?

Question

Yii

There are two attributes in the model "user_id" and "invite_id"
let's say equal to 1 and 2
It is necessary to check whether there is such a pair 1 and 2, and also whether there is a pair 2 and 1
How to implement this? The usual unique validator will not help here, write your own?

Answer 1

Perhaps something like this

[
    ['user_id', 'invite_id'],
    'unique',
    'targetAttribute' => ['user_id', 'invite_id'],
    'filter' => [
        'or',
        ['user_id' => $this->invite_id],
        ['invite_id' => $this->user_id],
    ]
],

Answer 2

ExistValidator not?