How to extend Zend_Form prefix path while configuring form through XML (Zend_Config) to load custom form elements? - zend-framework

Question

I'm loading my Zend_Form from an XML file :
<form>
<elements>
<role>
<type>MyProject_Form_Element_Select_Roles</type>
<options>
<label>Role:</label>
<value></value>
</options>
</role>
<valid>
<type>submit</type>
<options>
<label>Valid</label>
</options>
</valid>
</elements>
</form>
Of course the XML below doesn't work since Zend doesn't know how to load my custom field (which is just an extension of Zend_Form_Element_Select), but the line below doesn't work, if anyone can help :
<form>
<elementPrefixPath>
<prefix>MyProject_Form_Element_Select</prefix>
<path>MyProject/Form/Element/Select</path>
<type>element</type>
</elementPrefixPath>
...
I found these config features really cool but finding info or tutorial on them is really tough (I know there's some mapping rule between the Zend_Form objects structure and the expected config file, but I do never found a complete description of it if someone has a link)

Answer 1

Here's the correct form XML description :
<form>
<prefixPath>
<element>
<prefix>MyProject_Form_Element_Select</prefix>
<path>MyProject/Form/Element/Select</path>
</element>
</prefixPath>
<prefixPath>
<element>
<prefix>MyLib_Form_Element_Select</prefix>
<path>MyLib/Form/Element/Select</path>
</element>
</prefixPath>
<elements>
<role>
<type>Roles</type>
<options>
<label>Role:</label>
<value></value>
</options>
</role>
<valid>
<type>submit</type>
<options>
<mycustomoption></mycustomoption>
<label>Valid</label>
</options>
</valid>
</elements>
</form>
The custom options will be send inside the $options argument of the constructor of your Element
class MyProject_Form_Element_Select_Roles extends Zend_Form_Element_Select
{
public function __construct($spec, $options = null) {
//don't forget to call parent !
//$options is a Zend_Config that should have as a member mycustomptions
}
}