BelongsToMany relation not fully respect policy rules in attach

[freebuu]

• Laravel Version: 10.39.0
• Nova Version: 4.32.12
• PHP Version: 8.1.2
• Database Driver & Version: Postgres 16
• Operating System and Version: MacOS
• Browser type and version: Safari 17.3.1

Description:

I found a (possible) bug in the way BelongsToMany works. In the policy I created a condition like

    public function attachAnyGame(User $user, Model $model): bool
    {
        if ($model->games()->count() > 6) {
            return false;
        }

        return true;
    }

It works, the Attach button disappears if it is exceeded limit of 6.

However, if you use the Attach & Attach Another functionality, then the policy does not work and you can add it endlessly.

Detailed steps to reproduce the issue on a fresh Nova installation:

• Add BelongsToMany relation field
• Create policy for attaching this relation (like upper example)
• Try to attach relations with Attach & Attach Another

Expected Behavior

When clicking Attach & Attach Another - the policy checks the conditions and returns 403 if policy return false