ZC47 – Zend_Form Decorators Explained

Finally someone explain in good old english how the damn Decorators works.
The Zend_Form_Decorators are a mixed of the Decorator and Strategy Patterns, I believe, the concept is simple but it is hard to get.
Jon you're the man.
Thanks

Thanks for your useful videos.
i want to know how can i decorate error message?
and may you create a tutorial about implement WYSIWYG editors on zend framework?

Last edited by ulduz114 (2010-02-25 10:34:39)

I faced some problems when I used the type 'file'.
At first showed the error:
"Warning: Exception caught by form: No file found ... decorator unable to render file element"
Simply place the decorator 'File'.

But from now shows another error:

Warning: Exception caught by form: Method getMaxFileSize does not exist

And I stopped here ever since. I tried several configurations:

        $ maxfilesize = new Zend_Form_Element_Hidden ( 'form element');
        $ maxfilesize-> setValue (204800);

   $ photo = new Zend_Form_Element_File ( 'photo');
        $ photo-> setLabel ( 'Photo')
                 -> setValidators (array (
                    array ( 'Count', false, 1),
                    array ( 'Size', false, 204800),
                    array ( 'Extension', false, 'jpg, gif, png'),
                    array ( 'NotEmpty', true)
                ))
               
                / / -> setMaxFileSize (20000)
                -> setRequired (true);

But still without success. Is there opportunity to help with this?
Thank you.
Att

That's excactly what I tried to do.  'Errors' shouldn't be any different than 'Label'.  So this is what I did:

$this->setElementDecorators(array( 
       ‘ViewHelper ‘,
       array( 'Errors',
              array( 'tag' => 'td', 'placement' => 'APPEND' ),
        array(
            array( ‘data‘ => ‘HtmlTag‘), 
            array( ‘tag‘ => ‘td‘,‘class‘ => ‘element‘ ) 
       ),
       array( ‘Label‘, 
           array( ‘tag‘ => ‘td‘ )
       ),
       array(
            array(‘row‘ => ‘HtmlTag‘), 
            array( ‘tag‘ => ‘tr‘,‘class‘ => ‘row-element‘ )
       ) 
) );

In my head, it should be no different adding a td tag to the errors than to the label.  But my head does not always compute with Zend and in this case, what this does is adding an attribute to the ul element called td.

So where should I manipulate the Error decorator?  I want it to render itself the same ( ul -> li ), but I want it to have an additional td around the ul.