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A menu application for Django

Project description


Django Yama (Yet Another Menuing App) is a fairly generic menuing application for Django 1.1 (and up). It supports hierarchical (tree-structure) menus of arbitrary depth, and enables you to create menus linking to model objects and views from other Django apps, as well as external URLs.

The admin part of the app is completely customized, utilizing jQuery to provide a simple user interface. The interface was mostly ripped off from^W ^W ^W influenced by django-page-cms.

The best way of deploying django-yama in the front-end would probably be by the means of a custom template context processor. A template tag is included which can render the menu as an unordered HTML list.

Installation and configuration

The package is now available through PyPI. It depends on the django-mptt for its hierarchical structure, and obviously on Django itself, so you will also need to install those.

Alternatively, you can check out the latest revision from the Mercurial repository:

hg clone django-yama

Having installed Yama, you need a few of the usual steps:

  • Add 'yama' to your INSTALLED_APPS

  • To create the necessary database tables, run python syncdb; alternatively, if you’re using South, run python migrate yama.

  • Copy the contents of the media directory to your MEDIA_ROOT. You can also use django-staticfiles.

And a few more specific ones:

  • Since Yama uses Django’s machinery for Javascript translation, you need to provide an entry for Django’s javascript_catalog view in your Typically, that would look something like:

    (r'^jsi18n/(?P<packages>\S+?)/$', 'django.views.i18n.javascript_catalog'),
  • If you don’t intend to link to objects or views (i.e. plan to enter the URLs directly), you’re good to go. Otherwise, you need to tell Yama which models and views you wish to link to. You can either edit in the yama directory, or edit your site-wide and adjust the following couple of settings:

    • YAMA_MODELS, which is a dictionary. Keys are pairs in the form ('app_label', 'model name'), and values provide filters, which allow only a subset of model instances to be used as menu targets. Values can either be None, which indicates that no filtering is to be applied, or ``Q objects which express the desired filtering operations. Alternatively, values can also be callables which return Q objects; these callables are given a single argument, a HttpRequest object. In fact, callables are your only option for filtering in site-wide, since importing Q objects at the top level would cause a circular import. Here’s an example:

      def user_list(request):
          from django.db.models import Q
          return Q(is_active=True)
      YAMA_MODELS = {('auth', 'User') : user_list}

      All the given models are expected to implement the get_absolute_url method.

    • YAMA_VIEWS, which is a sequence of pairs. Each pair takes the form of ('reverse-able name', 'display name'). Example:

      YAMA_VIEWS = (
           ('blog-index', _('Blog index')),
           ('blog.views.archive', _('Blog archive')),

      Currently, the views are expected not to take any arguments (apart from request).

Displaying menus

Yama comes with a template tag for rendering Menu objects as unordered HTML lists. First, you need to load the tags in your template:

{% load yama %}

Then you can use {% menu_as_ul menu_var %} to display the menu as a list. Note that the top-level <ul> tags are not output, so you can have control over the id of the list. Here is a sample output:

<li class="first">
  <a ... class="a_first">Item 1</a>
<li class="li_dir">
  <a ... class="dir">Item 2</a>
    <li class="first">
      <a ... class="a_first">Item 2/1</a>
    <li class="last">
      <a ... class="a_last">Item 2/2</a>
<li class="last li_dir">
  <a ... class="a_last dir">Item 3</a>
    <li class="first">
      <a ... class="a_first">Item 3/1</a>
    <li class="">
      <a ... class="">Item 3/2</a>
    <li class="last">
      <a ... class="a_last">Item 3/3</a>

You can customize the displayed classes by passing keyword arguments to the tag, e.g:

{% menu_as_ul top_menu dir_li_class="has_subitems" %}

The default mapping is as follows:

            'first_li_class' : "first",
            'first_a_class' : "a_first",
            'last_li_class' : "last",
            'last_a_class' : "a_last",
            'dir_li_class' : "li_dir",
            'dir_a_class' : "dir",

This is a bit assymetric, but it works out of the box with these menus.

Note: currently, the template tag is quite database-heavy (hits the DB at least once per menu item).

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