How to set up django-siteree with django-postman

I'm trying to set up django-sitetree to work with django-postman, but I'm not having much luck.

Most of the pages work correctly, but I can't seem to figure out how to map the postman_view url to work properly. Here's what I have so far. Maybe someone can help me out a bit?

sitetrees.py

from sitetree.utils import tree, item

sitetrees = (
    tree('postman', items=[
        item('Messages', '/messages/', url_as_pattern=False, access_guest=False, access_loggedin=True, children=[
            item('Compose', 'postman_write', access_guest=False, access_loggedin=True),
            item('Inbox', 'postman_inbox', access_guest=False, access_loggedin=True),
            item('View', 'postman_view message.id', access_guest=False, access_loggedin=True, in_menu=False, in_sitetree=False)
        ])
    ])
)

Postman urls.py excerpt

urlpatterns = patterns('',                                                      
    url(r'^inbox/(?:(?P<option>'+OPTIONS+')/)?$', InboxView.as_view(), name='postman_inbox'),
    url(r'^sent/(?:(?P<option>'+OPTIONS+')/)?$', SentView.as_view(), name='postman_sent'),
    url(r'^archives/(?:(?P<option>'+OPTIONS+')/)?$', ArchivesView.as_view(), name='postman_archives'),
    url(r'^trash/(?:(?P<option>'+OPTIONS+')/)?$', TrashView.as_view(), name='postman_trash'),
    url(r'^write/(?:(?P<recipients>[^/#]+)/)?$', WriteView.as_view(), name='postman_write'),
    url(r'^reply/(?P<message_id>[\d]+)/$', ReplyView.as_view(), name='postman_reply'),
    url(r'^view/(?P<message_id>[\d]+)/$', MessageView.as_view(), name='postman_view'),
    url(r'^view/t/(?P<thread_id>[\d]+)/$', ConversationView.as_view(), name='postman_view_conversation'),
    url(r'^archive/$', ArchiveView.as_view(), name='postman_archive'),          
    url(r'^delete/$', DeleteView.as_view(), name='postman_delete'),             
    url(r'^undelete/$', UndeleteView.as_view(), name='postman_undelete'),          
    (r'^$', RedirectView.as_view(url='inbox/')),                                
)

Both postman_write and postman_inbox work fine, but when I visit postman_view I get this error:

SiteTreeError at /messages/view/2/

Unable to resolve current sitetree item to get a `title_resolved` for current page. Check whether there is an appropriate sitetree item defined for current URL.

Solution

Thanks to idle sign for pointing me in the right direction.

Turns out that the postman/view.html template does not have a variable called message, like I had assumed. There is an array of messages called pm_messages. So the corrected sitetrees.py is:

sitetrees = (
    tree('postman', items=[
        item('Messages', '/messages/', url_as_pattern=False, access_guest=False, access_loggedin=True, children=[
            item('Compose', 'postman_write', access_guest=False, access_loggedin=True),
            item('Inbox', 'postman_inbox', access_guest=False, access_loggedin=True),
            item('View', 'postman_view pm_messages.0.id', access_guest=False, access_loggedin=True, in_menu=False, in_sitetree=False)
        ])
    ])
)