Cakephp3事务查找查询

Question

在 cakephp3 中进行交易并在其中添加 get() 查询时一切正常。但是为什么在事务内部没有执行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

但我得到的是：

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

Answer 1

因为它对我来说工作正常，我怀疑你在事务回调之外还有一个额外的查询，它也会查找 id = 2，因为查询是由你显示的 find() 生成的永远不会执行调用，因为正在对查询进行惰性评估。

现在您刚刚创建了一个查询对象，为了实际执行它，您必须调用 all()、first()、toArray() 等。 ., 或遍历它。

另见 Cookbook > ...ORM > Query Builder > How Are Queries Lazily Evaluated

Cakephp3事务查找查询

Cakephp3 transaction find query

mysql

select

transactions

cakephp-3.0