public function rules()
{
$invoiceId = $this->entity()->id;
$rules = ['client.contacts' => 'valid_contacts', 'invoice_items' => 'valid_invoice_items', 'invoice_number' => 'required|unique:invoices,invoice_number,' . $invoiceId . ',id,account_id,' . $this->user()->account_id, 'discount' => 'positive', 'invoice_date' => 'required'];
/* There's a problem parsing the dates
if (Request::get('is_recurring') && Request::get('start_date') && Request::get('end_date')) {
$rules['end_date'] = 'after' . Request::get('start_date');
}
*/
return $rules;
}