cakephp 3中的多个数据库连接

Question

我正在尝试连接到多个数据库cakephp 3.我已经尝试了很多次,但所有问题和答案都在cakephp 2.我在文档中找到了配置连接cakephp 3.但我无法理解.

我有两个数据库:

1. tracking_system
     (Tables: trackers, events, etc..)
2. tracking_system_2
     (Tables: todos, actions, etc..)

使用数据库tracking_system已完全运行.但我不知道,如何连接到多个数据库(在我的情况下,使用第二个数据库tracking_system2).

在此先感谢您的帮助.

Answer 1

我得到了解决问题的方法.它运作良好.如果我在任何地方错了,请参考以下代码和评论.

- > app.php

'Datasources' => [
'default' => [
    'className' => 'Cake\Database\Connection',
    'driver' => 'Cake\Database\Driver\Mysql',
    'persistent' => false,
    'host' => 'localhost',
    //'port' => 'nonstandard_port_number',
    'username' => 'your_username',
    'password' => 'your_password',
    'database' => 'tracking_system', // This is my default database
    'encoding' => 'utf8',
    'timezone' => 'UTC',
    'cacheMetadata' => true,
    'quoteIdentifiers' => false,
    //'init' => ['SET GLOBAL innodb_stats_on_metadata = 0'],
],

'db2' => [
    'className' => 'Cake\Database\Connection',
    'driver' => 'Cake\Database\Driver\Mysql',
    'persistent' => false,
    'host' => 'localhost',
    //'port' => 'nonstandard_port_number',
    'username' => 'your_username',
    'password' => 'your_password',
    'database' => 'tracking_system2', // This is my second database
    'encoding' => 'utf8',
    'timezone' => 'UTC',
    'cacheMetadata' => true,
    'quoteIdentifiers' => false,
    //'init' => ['SET GLOBAL innodb_stats_on_metadata = 0'],
 ]
]

- > TodolistsController.php

database name: tracking_system2

table name: todolists

• 将此行添加到您的控制器

使用Cake\Datasource\ConnectionManager;

我的TodolistsController.php代码是:

<?php
namespace App\Controller;
use App\Controller\AppController;
use Cake\ORM\TableRegistry;
use Cake\ORM\Entity;
use Cake\Network\Exception\NotFoundException;
use Cake\Datasource\ConnectionManager; // This line is required

class TodolistsController extends AppController
{
public function todoadd(){
    $connection = ConnectionManager::get('db2'); // 'db2' where my second database is configured 
    $results = $connection->execute('SELECT * FROM todolists')->fetchAll('assoc');
    $this->set('results', $results);
    if($this->request->is('post')){
        $connection->insert('todolists', [
            'title' => $this->request->data['title'],
            'description' => $this->request->data['description']
        ]);
        $this->redirect($this->referer);
    }
}
}

- > TodolistsTable.php

<?php
namespace App\Model\Table;
use Cake\ORM\Table;

class TodolistsTable extends Table
{
    public static function defaultConnectionName()
    {
        return 'db2';
    }
    public function initialize(array $config)
    {
        $this->addBehavior('Timestamp');
    }
}

而已.

谢谢...

Answer 2

您可以defaultConnectionName()在默认使用另一个连接的表上声明该方法.在任何Table类中:

public static function defaultConnectionName()  
{
    return 'another_config_name';
}