October 2017
Intermediate to advanced
566 pages
14h 31m
English
Content preview from Drupal 8 Module Development
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MenuLink trees
As I mentioned in the section about Menus, menu links are stored hierarchically inside a menu. This hierarchy is represented via a menu link tree. There are a number of key players here.
We have the MenuLinkTree service, which is the interface used to load and prepare the tree of a certain menu. The loading is deferred to the MenuTreeStorage service, which does so on the basis of a MenuTreeParameters object that contains metadata on certain restrictions to be applied on the menu links that are loaded. We will see some examples of this a bit later.
What comes out of the MenuLinkTree service is an array of MenuLinkTreeElement that is essentially a value object that wraps around the MenuLinkInterface plugins and that provides ...
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I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.