belongsTo( 'Invoice' ); } public static function savePayment( $paymentID, $payment ) { $payment = (array) $payment; if ( $paymentID == 0 ) { $payment = Payment::create( $payment ); $paymentID = $payment['id']; } else { Payment::whereId( $paymentID )->update( $payment ); } return $paymentID; } public static function removePayment( $paymentID ) { Payment::whereId( $paymentID )->delete(); } }