Question

我跟随＆＃34;如何公开捆绑的语义配置＆＃34; symfony 2的官方手册。

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');
    }
}

这可能听起来很傻，但我找不到方法，如何在控制器中访问logintext参数？

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

不起作用。

我做错了什么？

Answer 1

在w9UserExtension.php行后的processConfiguration中添加

$container->setParameter('w9_user.logintext', $config['logintext']);

Answer 2

我想不加思索地将所有我的配置值添加到参数中，例如@acme，写几十条setParameter行并不够懒。

所以，我制作了一个setParameters方法来添加到Extension类。

/**
 * 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);
    }
}

然后您可以这样使用：

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 BAD PRACTICE ，因为如果您忘记了敏感的配置信息，可能会泄露这些信息，并通过暴露无用的配置而失去性能

此外，它还会阻止您在将配置变量添加到容器的参数包中之前对其进行大量清理。

如果你正在使用它，你应该使用parameters:而不是语义配置，除非你知道你在做什么。

使用风险自负。

如何使用symfony2访问控制器中的语义配置？

2 个答案: