Resource update processor problem

 $my_doc = array(
      'id' => '123'
      ,'pagetitle' => 'my title'
      ,'content' => 'my content'
);
$modx->runProcessor('resource/update',$my_doc);

 $this->isSiteStart = ($this->object->get('id') == $this->workingContext->getOption('site_start') || $this->object->get('id') == $this->modx->getOption('site_start'));

$this->workingContext = $this->modx->getContext($this->getProperty('context_key'));

$my_doc = array(
      'id' => '123'
      ,'pagetitle' => 'my title'
      ,'content' => 'my content'
      ,'context_key' => 'en'
);
$modx->runProcessor('resource/update',$my_doc);

$my_doc = array(
'id' => 123  // ID should be an integer not a string ! maybe the source of not returned object
,'pagetitle' => 'my title'
,'content' => 'my content'
,'context_key' => 'en'
);
$modx->runProcessor('resource/update',$my_doc);