6

我正在关注 symfony 2 的“如何公开捆绑的语义配置”官方手册。

我有我的configuration.php

namespace w9\UserBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    /**
     * {@inheritDoc}
     */
    public function getConfigTreeBuilder()
    {
        $treeBuilder = new TreeBuilder();
        $rootNode = $treeBuilder->root('w9_user');

        $rootNode
            ->children()
                ->scalarNode('logintext')->defaultValue('Zareejstruj się')->end()
            ->end()
        ;        

        return $treeBuilder;
    }
}

和 w9UserExtension.php：

namespace w9\UserBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\Config\FileLocator;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;
use Symfony\Component\DependencyInjection\Loader;

class w9UserExtension extends Extension
{
    /**
     * {@inheritDoc}
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
        $loader->load('services.yml');
    }
}

听起来可能很傻，但我找不到方法，如何访问控制器中的 logintext 参数？

$logintext = $this->container->getParameter("w9_user.logintext");

不起作用。

我做错了什么？

4

2 回答 2

11

在w9UserExtension.php后行中processConfiguration添加

$container->setParameter('w9_user.logintext', $config['logintext']);
于 2012-04-15T17:45:40.717 回答
0

我想不加选择地将我所有的配置值添加到参数中，比如@acme，写了几十setParameter行也不够懒惰。

所以，我做了一个setParameters方法来添加到Extension类中。

/**
 * Set all leaf values of the $config array as parameters in the $container.
 *
 * For example, a config such as this for the alias w9_user :
 *
 * w9_user:
 *   logintext: "hello"
 *   cache:
 *      enabled: true
 *   things:
 *      - first
 *      - second
 *
 * would yield the following :
 *
 * getParameter('w9_user.logintext') == "hello"
 * getParameter('w9_user.cache') ---> InvalidArgumentException
 * getParameter('w9_user.cache.enabled') == true
 * getParameter('w9_user.things') == array('first', 'second')
 *
 * It will resolve `%` variables like it normally would.
 * This is simply a convenience method to add the whole array.
 *
 * @param array $config
 * @param ContainerBuilder $container
 * @param string $namespace The parameter prefix, the alias by default.
 *                          Don't use this, it's for recursion.
 */
protected function setParameters(array $config, ContainerBuilder $container,
                                 $namespace = null)
{
    $namespace = (null === $namespace) ? $this->getAlias() : $namespace;

    // Is the config array associative or empty ?
    if (array_keys($config) !== range(0, count($config) - 1)) {
        foreach ($config as $k => $v) {
            $current = $namespace . '.' . $k;
            if (is_array($v)) {
                // Another array, let's use recursion
                $this->setParameters($v, $container, $current);
            } else {
                // It's a leaf, let's add it.
                $container->setParameter($current, $v);
            }
        }
    } else {
        // It is a sequential array, let's consider it as a leaf.
        $container->setParameter($namespace, $config);
    }
}

然后你可以像这样使用：

class w9UserExtension extends Extension
{
    /**
     * {@inheritDoc}
     */
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);

        // Add them ALL as container parameters
        $this->setParameters($config, $container);

        // ...
    }
}

警告

如果您没有广泛记录和/或需要这样的行为，这可能是不好的做法，因为如果您忘记它，您可能会暴露敏感的配置信息，并通过暴露无用的配置而失去性能。

此外，它会阻止您在将配置变量添加到容器的参数包之前对其进行广泛清理。

如果您正在使用它，您可能应该使用parameters:而不是语义配置，除非您知道自己在做什么。

使用风险自负。

于 2016-06-01T05:49:49.280 回答