在cakephp3中进行事务并在所有工作中添加get()查询时工作正常。但是为什么在事务中没有执行find()查询?
我在cakephp3中有以下控制器:
<?php
namespace App\Controller;
use Cake\Core\Configure;
use Cake\Network\Exception\NotFoundException;
use Cake\View\Exception\MissingTemplateException;
use Cake\Network\Session;
use Cake\Event\Event;
use Cake\Network\Http\Client;
use Cake\ORM\TableRegistry;
use Cake\Datasource\ConnectionManager;
class DashboardController extends AppController {
public function index(){
$conn = ConnectionManager::get('default');
$testModel = TableRegistry::get('Tests');
$select1=array();
$select2 = array();
$saved = array();
$conn->transactional(function ($connection)use(&$testModel,&$select1,&$select2,&$saved) {
$select1 = $testModel->find('all')->where(['id' => 2]); // article with id 12
$select2 = $testModel->get(1);
$select2->content = 'foo';
$saved = $testModel->save($select2);
});
}
}
?>
我希望在SQL-Log中得到这个:
BEGIN
SELECT Tests.id AS `Tests__id`, Tests.content AS `Tests__content` FROM tests Tests WHERE id = 2
SELECT Tests.id AS `Tests__id`, Tests.content AS `Tests__content` FROM tests Tests WHERE Tests.id = 1 LIMIT 1
UPDATE tests SET content = 'foo' WHERE id = 1
COMMIT
但我得到了:
BEGIN
SELECT Tests.id AS `Tests__id`, Tests.content AS `Tests__content` FROM tests Tests WHERE Tests.id = 1 LIMIT 1
UPDATE tests SET content = 'foo' WHERE id = 1
COMMIT
SELECT Tests.id AS `Tests__id`, Tests.content AS `Tests__content` FROM tests Tests WHERE id = 2
答案 0 :(得分:1)
由于它对我来说很好,我怀疑你在事务回调之外还有一个额外的查询,它也查找id = 2
,因为查询是由你显示的{{1}生成的因为查询是惰性求值的,所以永远不会执行调用。
目前您刚刚创建了一个查询对象,为了实际执行它,您必须致电find()
,all()
,first()
,等等。或者迭代它。
另请参阅 Cookbook > ...ORM > Query Builder > How Are Queries Lazily Evaluated