如何在 cakephp 中使用事务？

Posted 2023-03-16

【中文标题】如何在 cakephp 中使用事务？

【英文标题】：How to use transactions in cakephp?

【发布时间】：2019-11-01 16:04:33

【问题描述】：

我正在尝试将 commit 与 setConnection() 一起使用 但它不起作用...... 我不知道如何在 cakephp 中进行交易

我在文档中发现： https://book.cakephp.org/3.0/en/orm/database-basics.html#using-transactions

但我无法实现... 问题是我想保证两个实体的保存：

$this->Users->save($user) and $clientTable->save($client)

这是我的代码：

public function register()
    
        $locator = TableRegistry::getTableLocator();
        $clientTable = $locator->get("Clients");

        $user = $this->Users->newEntity();
        $client = $clientTable->newEntity();

        if ($this->request->is('post')) 

            $request = $this->request->getData();

            $user = $this->Users->patchEntity($user, $request);

            $result = false;
            // begin()
            if ($this->Users->save($user)) 
                $request['user_id'] = $user->id;
                $client = $clientTable->patchEntity($client, $request);
                if ($clientTable->save($client)) 
                    $result = true;
                
            
            if ($result) 
                // commit()
                $this->Flash->success(__('The user has been registered.'));

                return $this->redirect([
                    'action' => 'login'
                ]);
             else 
                // rollback()
            

        $this->Flash->error(__('The user could not be registered. Please, try again.'));
        
        $this->set(compact('$user'));
    

【参考方案1】：

你可以试试下面的代码：

try 
    $this->Users->getConnection()->begin();
    $this->Users->saveOrFail($userEntity, ['atomic' => false]);
    $this->Users->getConnection()->commit();

 catch(\Cake\ORM\Exception\PersistenceFailedException $e) 
    $this->Users->getConnection()->rollback();

【讨论】：

第二次保存呢？问题是我想保证两个实体的保存：$this->Users->save($user) and $clientTable->save($client)

感谢您的回答，您的回答让我找到了方向！

【参考方案2】：

我认为我能够以“事务性”进行交易。

在我的测试中，如果 Clients 实体有错误，则不会保存 Users 实体。

我不知道这是否是最好的方法，但它确实有效

public function register()
    
        $locator = TableRegistry::getTableLocator();
        $userTable = $locator->get("Users");
        $clientTable = $locator->get("Clients");

        $user = $userTable->newEntity();
        $client = $clientTable->newEntity();
        if ($this->request->is('post')) 
            $request = $this->request->getData();

            $user = $userTable->patchEntity($user, $request);

            $conn = ConnectionManager::get('default');

            try 
                $conn->transactional(function ($conn) use ($userTable, $clientTable, $user, $client, $request) 

                    $userTable->saveOrFail($user, [
                        'atomic' => false
                    ]);
                    $request['user_id'] = $user->id;
                    $client = $clientTable->patchEntity($client, $request);

                    $clientTable->saveOrFail($client, [
                        'atomic' => false
                    ]);
                );
                $this->Flash->success(__('The user has been registered.'));

                return $this->redirect([
                    'action' => 'login'
                ]);
             catch (\Cake\ORM\Exception\PersistenceFailedException $e) 
                $this->Flash->error(__('Error on save: 0', $e->getMessage()));

                return $this->redirect([
                    'action' => 'register'
                ]);
            

            $this->Flash->error(__('The user could not be registered. Please, try again.'));
        
        $this->set(compact('$user'));