hasOne(Customer::className(), ['id' => 'customer_id']); } public function getCustomer2() { return $this->hasOne(Customer::className(), ['id' => 'customer_id'])->inverseOf('orders2'); } public function getOrderItems() { return $this->hasMany(OrderItem::className(), ['order_id' => 'id']); } public function getItems() { return $this->hasMany(Item::className(), ['id' => 'item_id']) ->via('orderItems', function ($q) { // additional query configuration })->orderBy('id'); } public function getItemsInOrder1() { return $this->hasMany(Item::className(), ['id' => 'item_id']) ->via('orderItems', function ($q) { $q->orderBy(['subtotal' => SORT_ASC]); })->orderBy('name'); } public function getItemsInOrder2() { return $this->hasMany(Item::className(), ['id' => 'item_id']) ->via('orderItems', function ($q) { $q->orderBy(['subtotal' => SORT_DESC]); })->orderBy('name'); } public function getBooks() { return $this->hasMany(Item::className(), ['id' => 'item_id']) ->viaTable('tbl_order_item', ['order_id' => 'id']) ->where(['category_id' => 1]); } public function getBooks2() { return $this->hasMany(Item::className(), ['id' => 'item_id']) ->onCondition(['category_id' => 1]) ->viaTable('tbl_order_item', ['order_id' => 'id']); } public function beforeSave($insert) { if (parent::beforeSave($insert)) { $this->created_at = time(); return true; } else { return false; } } }