protected
        $outputBuffer = '';

    protected function execute($arguments = array(), $options = array())
    {
        // initialize the database connection
        $databaseManager = new sfDatabaseManager($this->configuration);
        $connection = $databaseManager->getDatabase($options['connection'] ? $options['connection'] : null)->getConnection();

        // 処理待ちリストから一行取得
        $process = Doctrine::getTable('Processes')->findOneByStatus('WAIT');
        $command = $process['command'];

        // バッファクリア
        $this->outputBuffer = '';
        try {
            // 実行。第二引数は標準出力、第三引数は標準エラー出力を受け取るコールバック関数
            list($output, $err) = $this->getFilesystem()->execute($command, array($this, 'setBuffer'), array($this, 'setBuffer'));
            $process['status'] = 'SUCCESS';
            $process['message'] = $output;
            $process->save();
        } catch (RuntimeException $e) {
            // コマンドが実行できなかった場合と、終了時エラーの場合はRuntimeExceptionがthrowされる
            $process['status'] = 'FAILED';
            // エラー時はexecuteの戻り値を取得できないのでコールバックの結果からメッセージを取得
            $process['message'] = $this->outputBuffer;
            // 必要なら$e->getCode();でエラーコード取得できます
            $process->save();
        }
    }

    public function setBuffer($output)
    {
        $this->outputBuffer .= $output;
    }

<?php

class sfWidgetFormInputCheckboxInverse extends sfWidgetFormInputCheckbox
{
    public function render($name, $value = null, $attributes = array(), $errors = array())
    {
        
        if (!(null !== $value && $value !== false))
        {
            $attributes['checked'] = 'checked';
        }

        if (!isset($attributes['value']) && null !== $this->getOption('value_attribute_value'))
        {
            $attributes['value'] = $this->getOption('value_attribute_value');
        }

        return parent::render($name, null, $attributes, $errors);
    }
}

<?php

class sfValidatorBooleanInverse extends sfValidatorBoolean
{

    protected function configure($options = array(), $messages = array())
    {
        parent::configure($options, $messages);
        $this->setOption('empty_value', true);
    }

    protected function doClean($value)
    {
        if (in_array($value, $this->getOption('true_values')))
        {
          return false;
        }

        if (in_array($value, $this->getOption('false_values')))
        {
          return true;
        }

        throw new sfValidatorError($this, 'invalid', array('value' => $value));
    }

}

        $this->widgetSchema['show_flag'] = new sfWidgetFormInputCheckboxInverse();
        $this->validatorSchema['show_flag'] = new sfValidatorBooleanInverse();

        $this->hasColumn('show_flag', 'boolean', null, array(
             'type' => 'boolean',
             'notnull' => true,
             'default' => 0,
             ));

<?php

class InvertBoolean extends Doctrine_Template
{
    protected $_options = array(
        'columns' => array()
    );
    
    public function setTableDefinition()
    {
        $this->addListener(new InvertBooleanListener($this->_options));
    }
    
    public function setUp()
    {
    }
}

<?php

class InvertBooleanListener extends Doctrine_Record_Listener
{
    protected $_options;
    
    public function __construct(array $options)
    {
        $this->_options = $options;
    }

    public function postHydrate(Doctrine_Event $event)
    {
        $obj = $event->data;
        foreach ($this->_options['columns'] as $column) {
            $obj->$column = !($obj->$column);
        }
        $event->set('data', $obj);
    }

    public function preSave(Doctrine_Event $event)
    {
        foreach ($this->_options['columns'] as $column) {
            $value = !($event->getInvoker()->get($column));
            $event->getInvoker()->set($column, $value);
        }
    }
}

        $this->hasColumn('show_flag', 'boolean', null, array(
             'type' => 'boolean',
             'notnull' => true,
             'default' => 0,
             ));

$this->actAs('InvertBoolean', array('columns'=>array('show_flag')));