CakePHP 3对联合查询的结果进行分页

在CakePHP 3中，对联合查询（JOIN）的结果进行分页可以通过使用Paginator组件来实现。以下是一个详细的步骤指南，帮助你在CakePHP 3中对联合查询的结果进行分页。

1. 设置模型关系

首先，确保你已经在模型中定义了正确的关联关系。例如，如果你有两个模型Articles和Users，并且你希望对这两个模型进行联合查询，你需要在模型中定义关联关系。

// In src/Model/Table/ArticlesTable.php
$this->belongsTo('Users', [
    'foreignKey' => 'user_id',
    'joinType' => 'INNER',
]);

2. 创建联合查询

在控制器中创建联合查询，并使用Paginator组件对结果进行分页。

// In src/Controller/ArticlesController.php
public function index()
{
    $this->loadComponent('Paginator');

    // Create the query with a join
    $query = $this->Articles->find()
        ->contain(['Users']) // Use contain to include associated Users data
        ->select([
            'Articles.id',
            'Articles.title',
            'Articles.created',
            'Users.username'
        ]);

    // Paginate the query
    $articles = $this->Paginator->paginate($query);

    // Set the paginated results to the view
    $this->set(compact('articles'));
}

3. 配置分页参数

你可以在控制器中配置分页参数，例如每页显示的记录数。

// In src/Controller/ArticlesController.php
public function index()
{
    $this->loadComponent('Paginator');

    // Create the query with a join
    $query = $this->Articles->find()
        ->contain(['Users']) // Use contain to include associated Users data
        ->select([
            'Articles.id',
            'Articles.title',
            'Articles.created',
            'Users.username'
        ]);

    // Configure pagination settings
    $this->paginate = [
        'limit' => 10, // Number of records per page
        'order' => [
            'Articles.created' => 'desc'
        ]
    ];

    // Paginate the query
    $articles = $this->Paginator->paginate($query);

    // Set the paginated results to the view
    $this->set(compact('articles'));
}

4. 在视图中显示分页结果

在视图文件中显示分页结果和分页控件。

// In src/Template/Articles/index.ctp
<table>
    <thead>
        <tr>
            <th>Title</th>
            <th>Author</th>
            <th>Created</th>
        </tr>
    </thead>
    <tbody>
        <?php foreach ($articles as $article): ?>
        <tr>
            <td><?= h($article->title) ?></td>
            <td><?= h($article->user->username) ?></td>
            <td><?= h($article->created) ?></td>
        </tr>
        <?php endforeach; ?>
    </tbody>
</table>

<div class="paginator">
    <ul class="pagination">
        <?= $this->Paginator->first('<< ' . __('first')) ?>
        <?= $this->Paginator->prev('< ' . __('previous')) ?>
        <?= $this->Paginator->numbers() ?>
        <?= $this->Paginator->next(__('next') . ' >') ?>
        <?= $this->Paginator->last(__('last') . ' >>') ?>
    </ul>
    <p><?= $this->Paginator->counter(__('Page {{page}} of {{pages}}, showing {{current}} record(s) out of {{count}} total')) ?></p>
</div>