Yii createCommand CURD操作

本文用作工作记录，也许有人会问为什么不用 Yii 的 Model 去操作 DB，原因很简单，Yii 的 Model 写法上是方便了很多，但是会执行多余的 SQL，打开 Yii 的执行 log 就会发现。

打开跟踪log的方法，config/main.php中 log routes 中添加

[
    "class" => "CWebLogRoute",
]

所以为了效率，为了 DB 服务器的性能考虑，还是使用 createCommand 的好。

insert

$row = Yii::app()->getDb()->createCommand()->insert("goods", array(
            "good_name" => $goods_name,
            "good_type" => $goods_type,
            "price" => $price,
            "buy_nums" => 0,
            "commit_nums" => 0,
            "create_time" => time(),
        ));

select

单表查询

$goodsTypes = Yii::app()->getDb()->createCommand()
        ->select("type_id, type_name")
        ->from("goods_type")
        ->where("status=:status", [
            ":status" => 1
        ])
        ->queryAll();

连表查询

$goods = Yii::app()->getDb()->createCommand()->from("goods g")
        ->select("g.good_id, g.good_name, gt.type_name, g.price, g.buy_nums, g.commit_nums, g.create_time")
        ->join("goods_type gt", "g.good_type=gt.type_id")
        ->where("g.`status`=:status1 and gt.`status`=:status2", [
            ":status1" => 1,
            ":status2" => 2
        ])
        ->order("g.create_time desc")
        ->queryAll();

delete

$row = Yii::app()->getDb()->createCommand()
        ->delete("goods", "good_id=:good_id", array(
            ":good_id" => $goods_id,
        ));

update

$row = Yii::app()->getDb()->createCommand()->update("goods", [
    "good_name" => $goods_name,
    "good_type" => $goods_type,
    "price" => $price,
        ], "good_id=:good_id", [
    ":good_id" => 1
        ]);

说明下，where 方法的使用方法很多，具体看 Yii 的代码注释，写的很详细。

就记录这点吧~