Yii 使用via或viaTable关系从关系生成mysql查询
考虑下面的例子Yii 使用via或viaTable关系从关系生成mysql查询,yii,yii2,yii2-advanced-app,Yii,Yii2,Yii2 Advanced App,考虑下面的例子 class Customers extends ActiveRecord { public function getOrders() { return $this->hasMany(Orders::className(), ['customer_id' => 'id']); } public function getOrderItems() { return $this->hasMany(O
class Customers extends ActiveRecord
{
public function getOrders()
{
return $this->hasMany(Orders::className(), ['customer_id' => 'id']);
}
public function getOrderItems()
{
return $this->hasMany(OrderItems::className(), ['order_id' => 'id'])
->via('orders');
}
}
如何从getOrderItems()
关系生成以下任一查询
SELECT * FROM `order-items`
LEFT JOIN `orders` ON `orders`.`id` = `order-items`.`order_id`
LEFT JOIN `customers` ON `customer`.`id` = `orders`.`customer_id`
或
或
我使用下面的代码来实现这一点
$customers = Customers::findAll();
$query = $customers[0]->getOrderItems()->createCommand()->rawSql;
但它只会产生
SELECT * FROM `order-items`
做什么…?使用以下方法:
$q = Customers::findAll()->innerJoinWith('orderItems')->createCommand()->rawSql;
您必须像这样使用关系名称而不是函数您真的想查看rawsql吗?您真的想查看rawsql吗?是的,有人告诉我可以从getOrderItems()relationkiamoz生成哪些其他查询!!伟大的你是传奇!
SELECT * FROM `order-items`
$q = Customers::findAll()->innerJoinWith('orderItems')->createCommand()->rawSql;