Cannot Load Yaml (two cases)

When running:

cake migrate g from db

Fatal error: Class 'Yaml' not found in ... line 404

FYI, that line number WILL be different because I threw in a quick "hack" fix; here's the full function _buildYaml:

function _buildYaml($tables)
{
    if (!is_array($tables)) $tables = array($tables);

    foreach ($tables as $table) {
        $dbShema['UP']['create_table'][$table] = $this->__buildUpSchema($table);
        $dbShema['DOWN']['drop_table'][] = $table;
    }

    if (count($dbShema['DOWN']['drop_table']) == 1) $dbShema['DOWN']['drop_table'] = $dbShema['DOWN']['drop_table'][0];

    // print file header
    $out  = '#'."\n";
    $out .= '# migration YAML file'."\n";
    $out .= '#'."\n";

    // Fix bug - can't load Yaml class
    require_once(dirname(__FILE__).DS.'..'.DS.'Yaml.php');
    return Yaml::Dump($dbShema);
}

You'll notice I just manually require_once'd the Yaml file. There's probably a better way to do this, and I'll leave that decision to you.

Same issue with: cake migrate

Fatal error: Class 'Yaml' not found in ... line 696

Again, I fixed it and that's why the line numbers are off slightly. I simply did the exact same require statement prior to Yaml::Load($yml);.

Please let me know if you need additional information as I'd be happy to help.