<?php namespace yiiunit\data\ar\redis; class OrderItem extends ActiveRecord { public static function primaryKey() { return ['order_id', 'item_id']; } public function attributes() { return ['order_id', 'item_id', 'quantity', 'subtotal']; } public function getOrder() { return $this->hasOne(Order::className(), ['id' => 'order_id']); } public function getItem() { return $this->hasOne(Item::className(), ['id' => 'item_id']); } }