Cakephp can't change database on-the-fly

问题

I am trying to connect from multiples databases from a loop, but seens CakePHP can't change database, only others infos (like user/pass/host).

app/Config/database.php

<?php
class DATABASE_CONFIG {
    [...]

    public $default = array(
        [..] // Where I have the companies
    );
    public $client = array(
        [...] // Fakke settings, because I will change it on-the-fly
    );
}

app/Controller/CronController.php

$companies = $this->Company->find('all');
foreach($companies as $company) {
    $settings = array(
        'datasource' => 'Database/Mysql',
        'host' => $company['Company']['host'],
        'login' => $company['Company']['username'],
        'password' => $company['Company']['password'],
        'database' => $company['Company']['database'],
    );

    ConnectionManager::drop('client');
    $db = ConnectionManager::create('client', $settings);

    try {
        debug($this->MyModel->find('first'));
    } catch (Exception $e) {
        echo '<pre>';
        echo "Exception: ",  $e->getMessage(), "\n";

        /*
        debug($this->MyModel->getDataSource());

        Outputs:

        [...]
        [config] => Array
            (
                [persistent] => 
                [host] => 0.0.0.0 // CORRECT HOST
                [login] => root // CORRECT LOGIN
                [password] => pass // CORRECT PASSWORD
                [database] => database1
                [port] => 3306
                [datasource] => Database/Mysql
                [prefix] => 
                [encoding] => utf8
            )
        [...]
        */
    }
}

It return the first connection and all others I can select nothing from MyModel, because it is wrong. It seens connection from user/password/host is ok, but, database are not changed, so, because user haven't permission to select on cdatabase, I get the error.

Array
(
    // First connection, connection ok, MyModel return nothing
)

// Second connection
Exception: SQLSTATE[42000]: Syntax error or access violation: 1142 SELECT command denied to user 'database_user_2'@'localhost' for table 'my_model'

// Third connection
Exception: SQLSTATE[42000]: Syntax error or access violation: 1142 SELECT command denied to user 'database_user_3'@'localhost' for table 'my_model'

// Fourth connection
Exception: SQLSTATE[42000]: Syntax error or access violation: 1142 SELECT command denied to user 'database_user_4'@'localhost' for table 'my_model'

// Fifth connection
Exception: SQLSTATE[42000]: Syntax error or access violation: 1142 SELECT command denied to user 'database_user_5'@'localhost' for table 'my_model'

Thanks!

回答1:

Try not to drop config, just alter the things you need.

For this task I successfully use

$dataSource = ConnectionManager::getDataSource('company_data');
$dataSource->config['schema'] = 'company_'.$id;

I don't know if database switching and mysql as engine is good pair. I use postgresql schemas for this purpose.

回答2:

You can use the model method setSource() to change the table or setDataSource() to change the db config.

来源：https://stackoverflow.com/questions/13956791/cakephp-cant-change-database-on-the-fly