Hello,
I've got several pages, let's say :

- AllRecipes
      - Recipe (A)
      - Recipe (B)
      - Recipe (C)
      - ...
- Category (a)
- Category (b)
- Category (c)
- ...

Each Recipe can belong to several Categories ; each Category can hold several Recipes ; I created a dataobject called "RecipeCategory" so that I can manage all the relationships between my Category Pages and my Recipe Pages.
If I click on "Category a" in my main navigation bar, it displays every title of all the recipes belonging to the category.

My problem is when I call the Recipe page itself.
The main navigation bar is coded this way :
<ul>
<% control Menu(1) %>
<li><a href="$Link" class="$LinkingMode">$MenuTitle</a></li>
<% end_control %>
</ul>
So the highlighted menu item is always "AllRecipes", since all my Recipes are children of the AllRecipes page...

I would like the Category (or even the categories, since it's a many-to-many relationship) to be the highlighted menu item, instead of the parent page.

What would be the best way to get to this ?
Thank you !

Stan

Toby, you've been really helpful, and I think I understand Silverstripe a little better thanks to you.
Actually, I think I stuck to much to the tutorial #5

So, what I did first was get rid of the useless dataobject. And then :

In Recette.php :

class Recette extends Page {
   
static $many_many = array(
'Categories' => 'Categorie'
);

function getCMSFields() {
$fields = parent::getCMSFields();

$categoriesTablefield = new ManyManyComplexTableField(
$this,
'Categories',
'Categorie',
array(
    'MenuTitle' => 'MenuTitle'
),
'getCMSFields_forPopup'
);
$categoriesTablefield->setAddTitle( 'Catégories' );
    $categoriesTablefield -> setPermissions(array());
$fields->addFieldToTab( 'Root.Content.Categories', $categoriesTablefield );

return $fields;
}
}

In Categorie.php :

class Categorie extends Page {
   
static $belongs_many_many = array(
'Recettes' => 'Recette',
);
   
}

And I added this function to my HomePage controller to retrieve all the recipes :

function Recettes() {
      return DataObject::get("Recette");   
   }

And it works well : I can select many categories every time I create a new "recette" (recipe) ; and every recipe is child of a category.

Now, is it possible to go a little further, and add a ManyManyComplexTableField to the "Categorie" pages in the CMS, to select several existing Recipes every time I create a new category ?

Thanks a lot !
Stan

Hello again

So, I tried to add a ManyManyComplexTableField to the "Categorie" pages in the CMS, but it doesn't work : since it's on the belongs_many_many side, I've got the same issue as here : http://www.silverstripe.org/dataobjectmanager-module-forum/show/264429#post264429

Any solution ?

Thanks again !

And using $many_many at both sides simply doesn't work : the second ManyManyComplexTableField doesn't take into account the relationships set up in the first one.