Building a dynamic tree with session information in Django (template question)

Question

Hi,

So I've got a expanding/collapsing tree that I'm keeping track of in session data.

I want to be able to render the tree in Django based upon the session data.

I am saving the state with something like:

request.session['treedata'][item_id] = state # (0 or 1)

In my template for rendering, I'm looping through the items and for each item I want to set the visibility of the object for example:

{% for item in itemlist %} 
<div {% if request.session.treedata.<whatgoeshere?> %}style="display:none"{% endif %}>
Content of the subtree
</div>
{% endfor %}

So the is where I'm confused.

Can I specify:

request.session.treedata.(item.id)

or

request.session.treedata.(forloop.counter)

Or do I have to preprocess the item and the state into a new context variable?

Thanks!

James

Answer 1

Assuming that item is a model, and item_id is item.id, you should be able to do:

{% for item in itemlist %} 
  <div {% if request.session.treedata.item.id %}style="display:none"{% endif %}>
    Content of the subtree
  </div>
{% endfor %}

You can read about how Django templates looking variables here:

http://docs.djangoproject.com/en/1.2/topics/templates/#variables