Symfony 1.4, form of embeded forms is not displayed
===

I use symfony 1.4 to design a web site.
There, I have a model class (named KanoonGood), which its corresponding Form class is:

    class KanoonGoodForm extends BaseKanoonGoodForm
    {
        public function configure()
        {
            $this->widgetSchema['count_num']->setAttribute('size', '1');
            $this->widgetSchema['price']->setAttribute('size', '1');
        }
    }

when someone calls the new action of a module based on this model class, I need to display not only one KanoonGoodForm, but 20 of them.

So I created a Form (named KanoonGoodsGroup), which has 20 embeded KanoonGoodForms:

    class KanoonGoodsGroupForm extends sfForm
    {
        public function configure() 
        { 
            for ($i = 0; $i < 20; $i++) 
            {
                $this->embedForm('good_'.$i, new KanoonGoodForm());
            }
        }
    }

and then I rewrite the new action of my module as follows:

    public function executeNew(sfWebRequest $request)
    {
        $this->form = new KanoonGoodsGroupForm();
    }

and in newSuccess template, I simply echoed this form:

    <?php echo $form ?>

the problem is that when I call the new action from browser, nothing is displayed, even no errors! just a white page, even without symfony dev tools!
I got stucked on this.
Can anyone help please?


