Render children of active branch with Zend Navigation view helper - zend-framework

Question

What I am asking is similar to this issue, which is still unresolved.
I'm trying to create a good submenu solution, but I can't seem to get Zend_View_Helper_Navigation_Menu to work with me.
Here is my XML navigation config:
<configdata>
<nav>
<index>
<label>Index</label>
<uri>/</uri>
<pages>
<home>
<label>home</label>
<uri>/</uri>
</home>
<about>
<label>about</label>
<uri>/about</uri>
</about>
<works>
<label>works</label>
<uri>/works</uri>
<pages>
<music>
<label>music</label>
<uri>/works/music</uri>
</music>
</pages>
</works>
<posts>
<label>posts</label>
<uri>/posts</uri>
</posts>
<admin>
<label>admin</label>
<uri>/admin</uri>
<pages>
<login>
<label>log in</label>
<uri>/admin/login</uri>
</login>
<settings>
<label>settings</label>
<uri>/admin/settings</uri>
</settings>
<register>
<label>register</label>
<uri>/admin/register</uri>
</register>
<logout>
<label>log out</label>
<uri>/admin/logout</uri>
</logout>
</pages>
</admin>
</pages>
</index>
</nav>
</configdata>
And here is the relevant code in my layout:
echo $this->navigation()->menu()->renderMenu(
null,
array(
'minDepth' => 2,
'maxDepth' => 2,
'onlyActiveBranch' => true
)
);
When I navigate to 'admin', I don't see the submenu. If I change the minDepth to 1 I can see that that menu and its children are 'active' in the source. Why are they not being rendered when the minDepth is set to 2?
I did a workaround for this, but I have to copy/paste it into every controller for it to work (because I need the request object in order to do it):
$pages = $this->view->navigation()->current()->getPages();
foreach ($pages as $page) {
$this->_setChildrenInvisible($page);
}
the _setChildrenInvisible() function:
private function _setChildrenInvisible(Zend_Navigation_Container $container) {
foreach ($container as $child) {
if ($child->hasChildren()) {
$this->_setChildrenInvisible($child);
}
$child->setVisible(false);
}
}
Im just trying to get admin's children to render in the submenu. Does anyone know how to fix this?

Answer 1

In the layout, in the renderMenu method, the renderParents attribute should be set to false
echo $this->navigation()->menu()->renderMenu(
null,
array(
'minDepth' => 2,
'maxDepth' => 2,
'onlyActiveBranch' => true,
'renderParents' => false
)
);

Answer 2

I know this is an old question but it can still be relevant for some people stumbling across this. In ZF2 it can be done the same as in ZF1 using:
echo $this->navigation()->menu()->renderSubMenu();